Average of 12 numbers 870. If average of 8 is 865, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 870. If average of 8 is 865, average of remaining 4?

A. 882

B. 878

C. 875

D. 880

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum12=10440. Sum8=6920. Remaining=3520. Average=880.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 1040. If average of 6 is 1035, average of remaining 3?

A. 1045

B. 1055

C. 1050

D. 1048

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Correct Answer: Option C

Explanation:
Sum9=9360. Sum6=6210. Remaining=3150. Average=1050.

This question belongs to: Maths Average

Question #2

The average of 4 numbers is 20. If three numbers are 15,20,25, fourth is

A. 18

B. 22

C. 25

D. 20

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Correct Answer: Option D

Explanation:
Fourth=80-60=20.

This question belongs to: Maths Average

Question #3

The average of 390,520,650 is

A. 515

B. 520

C. 530

D. 510

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Correct Answer: Option B

Explanation:
1560/3=520.

This question belongs to: Maths Average

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