Average of 12 numbers 720. If average of 8 is 715, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 720. If average of 8 is 715, average of remaining 4?

A. 728

B. 725

C. 730

D. 732

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=8640. Sum8=5720. Remaining=2920. Average=730.

This question belongs to: Maths Average

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Question #1

The average of 4 numbers is 26. If each number is decreased by 2, what is the new average?

A. 22

B. 28

C. 24

D. 26

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Correct Answer: Option C

Explanation:
New average =26-2=24.

This question belongs to: Maths Average

Question #2

Average of 15 numbers 560. If average of 9 is 555, average of remaining 6?

A. 567.5

B. 568

C. 570

D. 565

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Correct Answer: Option A

Explanation:
Sum15=8400. Sum9=4995. Remaining=3405. Average=567.5.

This question belongs to: Maths Average

Question #3

If average of 15 numbers is 40 and average of 10 is 45, average of remaining 5?

A. 35

B. 30

C. 32

D. 25

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Correct Answer: Option B

Explanation:
Sum15=600. Sum10=450. Remaining=150. Average=30.

This question belongs to: Maths Average

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