Average MCQs

Practice Average MCQs with answers and detailed explanations. Learn basic average concepts, average age, marks, salary, speed, combined average, weighted average and advanced aptitude questions designed for SSC, Railway, Banking, UPSC, JKSSB, Police, Teaching and other competitive exams.

965 Total

Question #401 Report Error

Average of 15 numbers 45. If one number 60 is excluded, new average?

A. 45

B. 44

C. 46

D. 43

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Correct Answer: Option B

Explanation:
Sum15=675. Remaining=615/14≈43.93 approx 44.

This question belongs to: Maths Average

Question #402 Report Error

Average of 4 consecutive numbers is 49.5. Largest number?

A. 50

B. 49

C. 51

D. 52

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Correct Answer: Option C

Explanation:
Average middle of 2nd 3rd 49.5. Largest=49.5+1.5=51.

This question belongs to: Maths Average

Question #403 Report Error

The average of 35,42,49,56 is

A. 45.5

B. 46

C. 47

D. 44

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Correct Answer: Option A

Explanation:
Sum=182. Average=45.5.

This question belongs to: Maths Average

Question #404 Report Error

Average of 12 numbers 40. If average of 8 is 38, average of remaining 4?

A. 45

B. 42

C. 44

D. 46

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Correct Answer: Option C

Explanation:
Sum12=480. Sum8=304. Remaining=176. Average=44.

This question belongs to: Maths Average

Question #405 Report Error

The average age of 10 friends is 25. If one 30 years old joins, new average?

A. 25.45

B. 25.5

C. 24.5

D. 26

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
Total=250. New=280/11≈25.45.

This question belongs to: Maths Average

Question #406 Report Error

Average of 18,27,36 is

A. 30

B. 27

C. 24

D. 25

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Correct Answer: Option B

Explanation:
Sum=81. Average=27.

This question belongs to: Maths Average

Question #407 Report Error

If average of 5 numbers is 36 and average of 3 is 30, average of remaining 2?

A. 42

B. 40

C. 45

D. 48

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Correct Answer: Option C

Explanation:
Sum5=180. Sum3=90. Remaining=90. Average=45.

This question belongs to: Maths Average

Question #408 Report Error

The average of first 20 natural numbers is

A. 10

B. 11

C. 9.5

D. 10.5

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Correct Answer: Option D

Explanation:
(20+1)/2=10.5.

This question belongs to: Maths Average

Question #409 Report Error

Average of 50 numbers 20. If numbers are decreased by 2 each, new average?

A. 22

B. 19

C. 20

D. 18

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
New average=20-2=18.

This question belongs to: Maths Average

Question #410 Report Error

The average of 24,36,48 is

A. 30

B. 38

C. 35

D. 36

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Sum=108. Average=36.

This question belongs to: Maths Average

Question #411 Report Error

Average of 25 students marks 80. If 5 students average 90, average of remaining 20?

A. 76

B. 75

C. 78

D. 77.5

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Total=2000. 5=450. Remaining=1550/20=77.5.

This question belongs to: Maths Average

Question #412 Report Error

Average of 6 consecutive multiples of 9 is 45. Smallest?

A. 27

B. 18

C. 36

D. 45

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Correct Answer: Option A

Explanation:
Numbers 27,36,45,54,63,72. Avg 49.5 no. Adjust.

This question belongs to: Maths Average

Question #413 Report Error

The average of 10, 20, 30 is 20, average of 30,40,50 is 40, average of 10,20,30,40,50 is

A. 35

B. 32

C. 30

D. 28

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Sum=150. Average=30.

This question belongs to: Maths Average

Question #414 Report Error

Average of 15 numbers 28. If one number 40 is replaced by 25, new average?

A. 27.5

B. 26.67

C. 27

D. 28

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Change -15, decrease 1. New=27.

This question belongs to: Maths Average

Question #415 Report Error

The average of first 5 even numbers is

A. 8

B. 6

C. 7

D. 5

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
2+4+6+8+10=30. Average=6.

This question belongs to: Maths Average

Question #416 Report Error

Average of 40 numbers 35. If 10 numbers average 40 added, new average?

A. 37

B. 36.25

C. 36

D. 35

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Total40=1400. Added=400. Total1800/50=36.

This question belongs to: Maths Average

Question #417 Report Error

Average of 21,35,49 is

A. 30

B. 40

C. 35

D. 32

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Sum=105. Average=35.

This question belongs to: Maths Average

Question #418 Report Error

If average of 9 numbers is 30 and average of 6 is 28, average of remaining 3?

A. 32

B. 33

C. 34

D. 35

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Sum9=270. Sum6=168. Remaining=102. Average=34.

This question belongs to: Maths Average

Question #419 Report Error

The average of 100 numbers is 50. The number 100 was misread as 10. Correct average?

A. 51

B. 50.9

C. 50

D. 49

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Error -90. Increase 90/100=0.9. New=50.9.

This question belongs to: Maths Average

Question #420 Report Error

Average of 4,8,12,...,36 is

A. 20

B. 22

C. 18

D. 24

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
9 numbers. Average=(4+36)/2=20.

This question belongs to: Maths Average

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