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. 732

B. 725

C. 728

D. 730

Answer: Option D

Solution (By JKExamLibrary)

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

This question belongs to: Maths Average

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Question #1 Report Error

Average of 10 numbers 1080. If average of 6 is 1075, average of remaining 4?

A. 1086

B. 1085

C. 1087.5

D. 1090

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Correct Answer: Option C

Explanation:
Sum10=10800. Sum6=6450. Remaining=4350. Average=1087.5.

This question belongs to: Maths Average

Question #2 Report Error

The average of 4 numbers is 20. If each number is increased by 5, what is the new average?

A. 25

B. 30

C. 15

D. 20

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Correct Answer: Option A

Explanation:
New average =20+5=25.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 2640. If average of 6 is 2635, average of remaining 3?

A. 2645

B. 2650

C. 2655

D. 2648

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Correct Answer: Option B

Explanation:
Sum9=23760. Sum6=15810. Remaining=7950. Average=2650.

This question belongs to: Maths Average

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