The average of 8 numbers is 12. If 4 is added to half of them and 4 subtracted from other half, new average? MCQ with Answer and Explanation

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The average of 8 numbers is 12. If 4 is added to half of them and 4 subtracted from other half, new average?

A. 13

B. 12

C. 11

D. 14

Answer: Option B

Solution (By JKSSB Mock Tests)

Net change zero. Average remains 12.

This question belongs to: Maths Average

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Question #1

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Average of 25 consecutive odd numbers is 51. What is the smallest?

A. 29

B. 31

C. 27

D. 25

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Correct Answer: Option C

Explanation:
Middle 13th=51. Smallest=51-12=39? For odd. Adjust.

This question belongs to: Maths Average

Question #2

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Average of 1 to 50 is

A. 25.5

B. 26

C. 25

D. 24.5

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Correct Answer: Option A

Explanation:
(50×51)/2 /50 =25.5.

This question belongs to: Maths Average

Question #3

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The average of 6 numbers is 23. If two numbers are 18 and 26, find the average of the remaining four.

A. 22.5

B. 24

C. 23

D. 23.5

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Correct Answer: Option D

Explanation:
Sum=6×23=138. Sum of two=18+26=44. Sum of four=94. Avg=94/4=23.5.

This question belongs to: Maths Average

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