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. 50

B. 52

C. 54

D. 48

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Average of 675,900,1125 is

A. 900

B. 910

C. 895

D. 890

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Correct Answer: Option A

Explanation:
2700/3=900.

This question belongs to: Maths Average

Question #2

Average of 10 numbers 2180. If average of 6 is 2175, average of remaining 4?

A. 2186

B. 2190

C. 2185

D. 2187.5

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Correct Answer: Option D

Explanation:
Sum10=21800. Sum6=13050. Remaining=8750. Average=2187.5.

This question belongs to: Maths Average

Question #3

What is the average of all numbers from 1 to 50 that are divisible by 7?

A. 28

B. 29

C. 27.5

D. 28.5

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Correct Answer: Option A

Explanation:
Numbers: 7,14,21,28,35,42,49. Sum=196, count=7, avg=28.

This question belongs to: Maths Average

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