The average age of 5 children is 12. If parents average 40, average of all 7? MCQ with Answer and Explanation

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The average age of 5 children is 12. If parents average 40, average of all 7?

A. 25

B. 18

C. 22

D. 20

Answer: Option D

Solution (By JKSSB Mock Tests)

Children total=60. Parents=80. Total=140. Average=20.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 1960. If average of 9 is 1955, average of remaining 6?

A. 1967.5

B. 1968

C. 1970

D. 1965

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Correct Answer: Option A

Explanation:
Sum15=29400. Sum9=17595. Remaining=11805. Average=1967.5.

This question belongs to: Maths Average

Question #2

Average of 10 numbers 1580. If average of 6 is 1575, average of remaining 4?

A. 1585

B. 1586

C. 1587.5

D. 1590

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Correct Answer: Option C

Explanation:
Sum10=15800. Sum6=9450. Remaining=6350. Average=1587.5.

This question belongs to: Maths Average

Question #3

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

A. 1880

B. 1878

C. 1875

D. 1882

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Correct Answer: Option A

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

This question belongs to: Maths Average

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