Average of 12 numbers 1620. If average of 8 is 1615, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1620. If average of 8 is 1615, average of remaining 4?

A. 1632

B. 1628

C. 1625

D. 1630

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum12=19440. Sum8=12920. Remaining=6520. Average=1630.

This question belongs to: Maths Average

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Question #1

Average of numbers from 25 to 50 is

A. 37.5

B. 38

C. 37

D. 36.5

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Correct Answer: Option A

Explanation:
(25+50)/2=37.5.

This question belongs to: Maths Average

Question #2

What is the average of all odd numbers from 1 to 29?

A. 14.5

B. 14

C. 15.5

D. 15

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Correct Answer: Option D

Explanation:
Odd numbers 1 to 29: 15 terms. Sum = n^2 =15^2=225. Average=225/15=15.

This question belongs to: Maths Average

Question #3

Average of 12 numbers 2270. If average of 8 is 2265, average of remaining 4?

A. 2278

B. 2275

C. 2282

D. 2280

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Correct Answer: Option D

Explanation:
Sum12=27240. Sum8=18120. Remaining=9120. Average=2280.

This question belongs to: Maths Average

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