Average of 12 numbers 620. If average of 8 is 615, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 620. If average of 8 is 615, average of remaining 4?

A. 632

B. 630

C. 625

D. 628

Answer: Option B

Solution (By JKExamLibrary)

Sum12=7440. Sum8=4920. Remaining=2520. Average=630.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 760. If average of 9 is 755, average of remaining 6?

A. 765

B. 770

C. 768

D. 767.5

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Correct Answer: Option D

Explanation:
Sum15=11400. Sum9=6795. Remaining=4605. Average=767.5.

This question belongs to: Maths Average

Question #2

The average age of 6 children is 10 years. If the age of one child is 8, find the average age of the remaining 5.

A. 10.4

B. 11

C. 10

D. 9.6

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Correct Answer: Option A

Explanation:
Sum=6×10=60. Remaining sum=60-8=52. Avg=52/5=10.4.

This question belongs to: Maths Average

Question #3

Average of 40 students is 50. If average of 10 is 60, average of remaining 30?

A. 48

B. 47

C. 46.67

D. 45

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Correct Answer: Option C

Explanation:
Total=2000. 10=600. Remaining=1400. 1400/30≈46.67.

This question belongs to: Maths Average

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