The average of 4 numbers is 12. If each number is multiplied by 2 and then 5 is added, what is the new average? MCQ with Answer and Explanation

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The average of 4 numbers is 12. If each number is multiplied by 2 and then 5 is added, what is the new average?

A. 27

B. 29

C. 30

D. 24

Answer: Option B

Solution (By JKSSB Mock Tests)

New average = (12×2)+5 =24+5=29.

This question belongs to: Maths Average

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Question #1

Average of 1455,1940,2425 is

A. 1930

B. 1935

C. 1940

D. 1950

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Correct Answer: Option C

Explanation:
5820/3=1940.

This question belongs to: Maths Average

Question #2

What is the average of squares of first 5 natural numbers?

A. 10

B. 11

C. 55

D. 15

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Correct Answer: Option B

Explanation:
Squares: 1,4,9,16,25. Sum=55. Average=55/5=11.

This question belongs to: Maths Average

Question #3

The average of 9 observations is 40. If each observation is decreased by 4, what is the new average?

A. 36

B. 40

C. 44

D. 32

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Correct Answer: Option A

Explanation:
New average =40-4=36.

This question belongs to: Maths Average

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