Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
📊 SSC GD, MTS, Banking
Average — formula, example and practice
Weighted means and “new average after joining/leaving” problems.
Content type: original worked example. Not labelled as a previous-year question.
Timed GK/quant mock Shortcuts CBSE Class 10 Maths 150 questions
Formula
Average = Sum of observations / Number of observations
The mean value. Competitive papers almost always change the group: someone joins, leaves, or a new average is given.
What you should learn here
Cricket and age-average questions are the same algebra. Write sum = average × n, apply the change, divide again.
Worked example
Question. The average of 5 numbers is 20. A sixth number 26 is added. New average?
Solution. Old sum = 100. New sum = 126. New average = 126/6 = 21.
Common mistake. Averaging two averages without weights (different group sizes).
When to use the shortcut. Always recover the sum first. Never average the averages unless the counts are equal.
Related chapters and tests
Ratio and Proportion Time and Work Percentage Profit and Loss All formulas SSC GD mocks SSC CGL mocks
150 important Average questions
Original arithmetic practice for this page. Not labelled as previous-year SSC/railway items. Tap an option to mark it. Open “Answer” for the working.
Score: 0 / 0
Average of 6 numbers is 24. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (147+24)/7 = 24.
Average of 14, 20 and 26 is
Answer / solution
Correct option: D
(14+20+26)/3 = 20.
Average of 8 numbers is 46. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (46×8−22)/7 = 49.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (195+40)/7 = 33.
Average of 18, 24 and 25 is
Answer / solution
Correct option: D
(18+24+25)/3 = 22.
Average of 8 numbers is 54. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (54×8−30)/7 = 57.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (243+24)/7 = 38.
Average of 13, 21 and 24 is
Answer / solution
Correct option: A
(13+21+24)/3 = 19.
Average of 8 numbers is 42. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (42×8−22)/7 = 44.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 40 is added. New average is
Answer / solution
Correct option: D
New avg = (171+40)/7 = 30.
Average of 17, 18 and 28 is
Answer / solution
Correct option: C
(17+18+28)/3 = 21.
Average of 8 numbers is 50. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (50×8−30)/7 = 52.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (219+24)/7 = 34.
Average of 12, 22 and 27 is
Answer / solution
Correct option: B
(12+22+27)/3 = 20.
Average of 8 numbers is 58. If 22 is removed, new average is
Answer / solution
Correct option: C
New = (58×8−22)/7 = 63.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (147+40)/7 = 26.
Average of 16, 19 and 26 is
Answer / solution
Correct option: D
(16+19+26)/3 = 20.
Average of 8 numbers is 46. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (46×8−30)/7 = 48.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (195+24)/7 = 31.
Average of 20, 23 and 25 is
Answer / solution
Correct option: B
(20+23+25)/3 = 22.
Average of 8 numbers is 54. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (54×8−22)/7 = 58.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (243+40)/7 = 40.
Average of 15, 20 and 24 is
Answer / solution
Correct option: C
(15+20+24)/3 = 19.
Average of 8 numbers is 42. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (42×8−30)/7 = 43.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 24 is added. New average is
Answer / solution
Correct option: A
New avg = (171+24)/7 = 27.
Average of 19, 24 and 28 is
Answer / solution
Correct option: A
(19+24+28)/3 = 23.
Average of 8 numbers is 50. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (50×8−22)/7 = 54.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (219+40)/7 = 37.
Average of 14, 21 and 27 is
Answer / solution
Correct option: A
(14+21+27)/3 = 20.
Average of 8 numbers is 58. If 30 is removed, new average is
Answer / solution
Correct option: A
New = (58×8−30)/7 = 62.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (147+24)/7 = 24.
Average of 18, 18 and 26 is
Answer / solution
Correct option: A
(18+18+26)/3 = 20.
Average of 8 numbers is 46. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (46×8−22)/7 = 49.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (195+40)/7 = 33.
Average of 13, 22 and 25 is
Answer / solution
Correct option: A
(13+22+25)/3 = 20.
Average of 8 numbers is 54. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (54×8−30)/7 = 57.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (243+24)/7 = 38.
Average of 17, 19 and 24 is
Answer / solution
Correct option: C
(17+19+24)/3 = 20.
Average of 8 numbers is 42. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (42×8−22)/7 = 44.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 40 is added. New average is
Answer / solution
Correct option: D
New avg = (171+40)/7 = 30.
Average of 12, 23 and 28 is
Answer / solution
Correct option: D
(12+23+28)/3 = 21.
Average of 8 numbers is 50. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (50×8−30)/7 = 52.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (219+24)/7 = 34.
Average of 16, 20 and 27 is
Answer / solution
Correct option: D
(16+20+27)/3 = 21.
Average of 8 numbers is 58. If 22 is removed, new average is
Answer / solution
Correct option: C
New = (58×8−22)/7 = 63.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (147+40)/7 = 26.
Average of 20, 24 and 26 is
Answer / solution
Correct option: C
(20+24+26)/3 = 23.
Average of 8 numbers is 46. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (46×8−30)/7 = 48.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (195+24)/7 = 31.
Average of 15, 21 and 25 is
Answer / solution
Correct option: B
(15+21+25)/3 = 20.
Average of 8 numbers is 54. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (54×8−22)/7 = 58.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (243+40)/7 = 40.
Average of 19, 18 and 24 is
Answer / solution
Correct option: B
(19+18+24)/3 = 20.
Average of 8 numbers is 42. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (42×8−30)/7 = 43.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 24 is added. New average is
Answer / solution
Correct option: A
New avg = (171+24)/7 = 27.
Average of 14, 22 and 28 is
Answer / solution
Correct option: B
(14+22+28)/3 = 21.
Average of 8 numbers is 50. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (50×8−22)/7 = 54.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (219+40)/7 = 37.
Average of 18, 19 and 27 is
Answer / solution
Correct option: D
(18+19+27)/3 = 21.
Average of 8 numbers is 58. If 30 is removed, new average is
Answer / solution
Correct option: A
New = (58×8−30)/7 = 62.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (147+24)/7 = 24.
Average of 13, 23 and 26 is
Answer / solution
Correct option: C
(13+23+26)/3 = 20.
Average of 8 numbers is 46. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (46×8−22)/7 = 49.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (195+40)/7 = 33.
Average of 17, 20 and 25 is
Answer / solution
Correct option: C
(17+20+25)/3 = 20.
Average of 8 numbers is 54. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (54×8−30)/7 = 57.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (243+24)/7 = 38.
Average of 12, 24 and 24 is
Answer / solution
Correct option: C
(12+24+24)/3 = 20.
Average of 8 numbers is 42. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (42×8−22)/7 = 44.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 40 is added. New average is
Answer / solution
Correct option: D
New avg = (171+40)/7 = 30.
Average of 16, 21 and 28 is
Answer / solution
Correct option: B
(16+21+28)/3 = 21.
Average of 8 numbers is 50. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (50×8−30)/7 = 52.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (219+24)/7 = 34.
Average of 20, 18 and 27 is
Answer / solution
Correct option: A
(20+18+27)/3 = 21.
Average of 8 numbers is 58. If 22 is removed, new average is
Answer / solution
Correct option: C
New = (58×8−22)/7 = 63.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (147+40)/7 = 26.
Average of 15, 22 and 26 is
Answer / solution
Correct option: A
(15+22+26)/3 = 21.
Average of 8 numbers is 46. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (46×8−30)/7 = 48.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (195+24)/7 = 31.
Average of 19, 19 and 25 is
Answer / solution
Correct option: C
(19+19+25)/3 = 21.
Average of 8 numbers is 54. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (54×8−22)/7 = 58.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (243+40)/7 = 40.
Average of 14, 23 and 24 is
Answer / solution
Correct option: B
(14+23+24)/3 = 20.
Average of 8 numbers is 42. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (42×8−30)/7 = 43.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 24 is added. New average is
Answer / solution
Correct option: A
New avg = (171+24)/7 = 27.
Average of 18, 20 and 28 is
Answer / solution
Correct option: C
(18+20+28)/3 = 22.
Average of 8 numbers is 50. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (50×8−22)/7 = 54.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (219+40)/7 = 37.
Average of 13, 24 and 27 is
Answer / solution
Correct option: A
(13+24+27)/3 = 21.
Average of 8 numbers is 58. If 30 is removed, new average is
Answer / solution
Correct option: A
New = (58×8−30)/7 = 62.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (147+24)/7 = 24.
Average of 17, 21 and 26 is
Answer / solution
Correct option: A
(17+21+26)/3 = 21.
Average of 8 numbers is 46. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (46×8−22)/7 = 49.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (195+40)/7 = 33.
Average of 12, 18 and 25 is
Answer / solution
Correct option: A
(12+18+25)/3 = 18.
Average of 8 numbers is 54. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (54×8−30)/7 = 57.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (243+24)/7 = 38.
Average of 16, 22 and 24 is
Answer / solution
Correct option: C
(16+22+24)/3 = 20.
Average of 8 numbers is 42. If 22 is removed, new average is
Answer / solution
Correct option: B
New = (42×8−22)/7 = 44.
Average of 5 terms in AP starting at 14 with common difference 5 is
Answer / solution
Correct option: A
Sum = 120, average = 120/5 = 24.
Average of 6 numbers is 28. A new number 40 is added. New average is
Answer / solution
Correct option: D
New avg = (171+40)/7 = 30.
Average of 20, 19 and 28 is
Answer / solution
Correct option: C
(20+19+28)/3 = 22.
Average of 8 numbers is 50. If 30 is removed, new average is
Answer / solution
Correct option: D
New = (50×8−30)/7 = 52.
Average of 5 terms in AP starting at 22 with common difference 5 is
Answer / solution
Correct option: D
Sum = 160, average = 160/5 = 32.
Average of 6 numbers is 36. A new number 24 is added. New average is
Answer / solution
Correct option: C
New avg = (219+24)/7 = 34.
Average of 15, 23 and 27 is
Answer / solution
Correct option: D
(15+23+27)/3 = 21.
Average of 8 numbers is 58. If 22 is removed, new average is
Answer / solution
Correct option: C
New = (58×8−22)/7 = 63.
Average of 5 terms in AP starting at 10 with common difference 5 is
Answer / solution
Correct option: D
Sum = 100, average = 100/5 = 20.
Average of 6 numbers is 24. A new number 40 is added. New average is
Answer / solution
Correct option: B
New avg = (147+40)/7 = 26.
Average of 19, 20 and 26 is
Answer / solution
Correct option: D
(19+20+26)/3 = 21.
Average of 8 numbers is 46. If 30 is removed, new average is
Answer / solution
Correct option: B
New = (46×8−30)/7 = 48.
Average of 5 terms in AP starting at 18 with common difference 5 is
Answer / solution
Correct option: B
Sum = 140, average = 140/5 = 28.
Average of 6 numbers is 32. A new number 24 is added. New average is
Answer / solution
Correct option: B
New avg = (195+24)/7 = 31.
Average of 14, 24 and 25 is
Answer / solution
Correct option: D
(14+24+25)/3 = 21.
Average of 8 numbers is 54. If 22 is removed, new average is
Answer / solution
Correct option: D
New = (54×8−22)/7 = 58.
Average of 5 terms in AP starting at 26 with common difference 5 is
Answer / solution
Correct option: A
Sum = 180, average = 180/5 = 36.
Average of 6 numbers is 40. A new number 40 is added. New average is
Answer / solution
Correct option: C
New avg = (243+40)/7 = 40.
FAQs
Are these previous-year SSC questions?
No year or shift is claimed on these pages. Each maths section has 150 original practice MCQs. When a verified source database exists, a question will show exam + year; until then it is practice.
Where are Class 10 board formulas?
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