The average of 8 numbers is 31. If each number is increased by 3, what is the new average? MCQ with Answer and Explanation

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The average of 8 numbers is 31. If each number is increased by 3, what is the new average?

A. 28

B. 31

C. 37

D. 34

Answer: Option D

Solution (By JKExamLibrary)

New average =31+3=34.

This question belongs to: Maths Average

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Question #1

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Average of 12 numbers 2470. If average of 8 is 2465, average of remaining 4?

A. 2478

B. 2480

C. 2475

D. 2482

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Correct Answer: Option B

Explanation:
Sum12=29640. Sum8=19720. Remaining=9920. Average=2480.

This question belongs to: Maths Average

Question #2

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The average of 8 numbers is 40. If one number is 20, find the average of the remaining 7.

A. 41.5

B. 43

C. 42

D. 42.86

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Correct Answer: Option D

Explanation:
Sum=8×40=320. Remaining sum=320-20=300. Avg=300/7=42.86.

This question belongs to: Maths Average

Question #3

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Average of 9 numbers 690. If average of 6 is 685, average of remaining 3?

A. 705

B. 698

C. 695

D. 700

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Correct Answer: Option D

Explanation:
Sum9=6210. Sum6=4110. Remaining=2100. Average=700.

This question belongs to: Maths Average

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