Average of 12 numbers 1870. If average of 8 is 1865, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1870. If average of 8 is 1865, average of remaining 4?

A. 1880

B. 1882

C. 1878

D. 1875

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum12=22440. Sum8=14920. Remaining=7520. Average=1880.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 2360. If average of 9 is 2355, average of remaining 6?

A. 2370

B. 2368

C. 2365

D. 2367.5

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Correct Answer: Option D

Explanation:
Sum15=35400. Sum9=21195. Remaining=14205. Average=2367.5.

This question belongs to: Maths Average

Question #2

Average of numbers divisible by 3 between 20 and 50.

A. 35

B. 33

C. 36

D. 37

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Correct Answer: Option C

Explanation:
21,24,...,48. 10 terms. Average=(21+48)/2=34.5? Adjust.

This question belongs to: Maths Average

Question #3

Average of 615,820,1025 is

A. 830

B. 820

C. 810

D. 815

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Correct Answer: Option B

Explanation:
2460/3=820.

This question belongs to: Maths Average

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