Average of 12 numbers 1970. If average of 8 is 1965, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1970. If average of 8 is 1965, average of remaining 4?

A. 1978

B. 1982

C. 1980

D. 1975

Answer: Option C

Solution (By JKExamLibrary)

Sum12=23640. Sum8=15720. Remaining=7920. Average=1980.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 10 numbers 28. If average of 6 is 25, average of remaining 4?

A. 30

B. 35

C. 32.5

D. 33

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Correct Answer: Option C

Explanation:
Sum10=280. Sum6=150. Remaining=130. Average=32.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of 25 numbers 42. If one number 60 replaced by 30, new average?

A. 43

B. 40

C. 42

D. 41

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Correct Answer: Option D

Explanation:
Change -30, decrease 1.2, new 40.8 approx 41.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 numbers 1430. If average of 6 is 1425, average of remaining 4?

A. 1436

B. 1440

C. 1435

D. 1437.5

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Correct Answer: Option D

Explanation:
Sum10=14300. Sum6=8550. Remaining=5750. Average=1437.5.

This question belongs to: Maths Average

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