Average of 12 numbers 1570. If average of 8 is 1565, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1570. If average of 8 is 1565, average of remaining 4?

A. 1580

B. 1582

C. 1575

D. 1578

Answer: Option A

Solution (By JKExamLibrary)

Sum12=18840. Sum8=12520. Remaining=6320. Average=1580.

This question belongs to: Maths Average

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Question #1

Average of first 12 natural numbers is

A. 6.5

B. 7

C. 6

D. 5.5

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Correct Answer: Option A

Explanation:
13/2=6.5.

This question belongs to: Maths Average

Question #2

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

A. 1882

B. 1875

C. 1878

D. 1880

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Correct Answer: Option D

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

This question belongs to: Maths Average

Question #3

The average of 9 numbers is 35. If average of first 4 is 32, average of last 6 is 37, the 4th number?

A. 33

B. 35

C. 34

D. 36

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Correct Answer: Option A

Explanation:
Sum9=315. Sum1-4=128. Sum4-9=222. 4th=128+222-315=35.

This question belongs to: Maths Average

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