Average of 10 numbers 1580. If average of 6 is 1575, average of remaining 4? MCQ with Answer and Explanation

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

A. 1590

B. 1587.5

C. 1586

D. 1585

Answer: Option B

Solution (By JKExamLibrary)

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

This question belongs to: Maths Average

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Practice More Average Questions

Question #1 Report Error

Average of 8 numbers 2400. If average of 5 is 2395, average of remaining 3?

A. 2410

B. 2407

C. 2408.33

D. 2405

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Correct Answer: Option C

Explanation:
Sum8=19200. Sum5=11975. Remaining=7225. Average≈2408.33.

This question belongs to: Maths Average

Question #2 Report Error

What is the average of the first 5 prime numbers?

A. 6.0

B. 5.6

C. 5.4

D. 5.8

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Correct Answer: Option B

Explanation:
Primes: 2,3,5,7,11 sum=28, avg=28/5=5.6.

This question belongs to: Maths Average

Question #3 Report Error

Average of 8 observations is 40. If two observations 30 and 50 are included, new average?

A. 40

B. 41

C. 42

D. 39

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Correct Answer: Option A

Explanation:
Sum8=320. New sum=320+80=400. Numbers10. Average=40.

This question belongs to: Maths Average

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