If average of 10 numbers is 20 and average of 6 is 18, average of remaining 4? MCQ with Answer and Explanation

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If average of 10 numbers is 20 and average of 6 is 18, average of remaining 4?

A. 24

B. 23

C. 22

D. 25

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum10=200. Sum6=108. Remaining=92. Average=23.

This question belongs to: Maths Average

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Question #1

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The average of 8 numbers is 34. If each number is multiplied by 1.5, what is the new average?

A. 34

B. 25.5

C. 51

D. 68

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Correct Answer: Option C

Explanation:
New average =34×1.5=51.

This question belongs to: Maths Average

Question #2

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Average of 8 numbers 1700. If average of 5 is 1695, average of remaining 3?

A. 1707

B. 1708.33

C. 1705

D. 1710

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Correct Answer: Option B

Explanation:
Sum8=13600. Sum5=8475. Remaining=5125. Average≈1708.33.

This question belongs to: Maths Average

Question #3

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The average of 8 numbers is 27. If each number is decreased by 4, what is the new average?

A. 27

B. 23

C. 19

D. 31

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Correct Answer: Option B

Explanation:
New average =27-4=23.

This question belongs to: Maths Average

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