Average of 12 numbers 520. If average of 8 is 515, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 520. If average of 8 is 515, average of remaining 4?

A. 530

B. 528

C. 525

D. 532

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum12=6240. Sum8=4120. Remaining=2120. Average=530.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 38. If one number 50 replaced by 20, new average?

A. 36

B. 36.67

C. 35

D. 37

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Correct Answer: Option B

Explanation:
Change -30, decrease 2. New≈36.

This question belongs to: Maths Average

Question #2

Average of 10 numbers 630. If average of 6 is 625, average of remaining 4?

A. 635

B. 636

C. 640

D. 637.5

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Correct Answer: Option D

Explanation:
Sum10=6300. Sum6=3750. Remaining=2550. Average=637.5.

This question belongs to: Maths Average

Question #3

Average of 10 numbers 1830. If average of 6 is 1825, average of remaining 4?

A. 1836

B. 1837.5

C. 1840

D. 1835

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Correct Answer: Option B

Explanation:
Sum10=18300. Sum6=10950. Remaining=7350. Average=1837.5.

This question belongs to: Maths Average

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