Average of 12 numbers 2470. If average of 8 is 2465, average of remaining 4? MCQ with Answer and Explanation

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

A. 2478

B. 2482

C. 2475

D. 2480

Answer: Option D

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Average

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Question #1

The average of 4 numbers is 25. If each number is multiplied by 3, what is the new average?

A. 75

B. 25

C. 100

D. 50

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Correct Answer: Option A

Explanation:
If each number is multiplied by a constant, the average also gets multiplied by that constant. New average = 25×3=75.

This question belongs to: Maths Average

Question #2

The average of 1560,2080,2600 is

A. 2080

B. 2070

C. 2090

D. 2075

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Correct Answer: Option A

Explanation:
6240/3=2080.

This question belongs to: Maths Average

Question #3

The average of 55,65,75,85 is

A. 70

B. 75

C. 65

D. 72

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Correct Answer: Option A

Explanation:
280/4=70.

This question belongs to: Maths Average

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