Average of 12 numbers 45. If average of 9 is 42, average of remaining 3? MCQ with Answer and Explanation

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Average of 12 numbers 45. If average of 9 is 42, average of remaining 3?

A. 48

B. 54

C. 50

D. 52

Answer: Option D

Solution (By JKExamLibrary)

Sum12=540. Sum9=378. Remaining=162. Average=54.

This question belongs to: Maths Average

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Question #1 Report Error

Average of all three digit numbers is

A. 500

B. 600

C. 550

D. 549.5

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Correct Answer: Option D

Explanation:
(100+999)/2=549.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of 8 numbers 22. If 4 numbers average 20, other 4 average?

A. 26

B. 23

C. 22

D. 24

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Correct Answer: Option D

Explanation:
Sum8=176. Sum4=80. Other=96. Average=24.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 numbers 630. If average of 6 is 625, average of remaining 4?

A. 637.5

B. 640

C. 635

D. 636

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Correct Answer: Option A

Explanation:
Sum10=6300. Sum6=3750. Remaining=2550. Average=637.5.

This question belongs to: Maths Average

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