Average of 50 numbers 40. If two numbers 30 and 50 are replaced by 40 and 60, new average? MCQ with Answer and Explanation

Average of 50 numbers 40. If two numbers 30 and 50 are replaced by 40 and 60, new average?

A. 40.4

B. 41

C. 39

D. 40

Answer: Option A

Net change +20, increase 20/50=0.4, new 40.4.

This question belongs to: Maths Average

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Question #1 Report Error

A team has average 25 runs per player for 11 players. One scores 40, what is average of remaining?

A. 22

B. 23.6

C. 24

D. 25

Correct Answer: Option B

Explanation:
Total=275. Remaining =235 for 10. 23.5 ≈23.6.

This question belongs to: Maths Average

Question #2 Report Error

What is the average of the first 8 odd numbers?

A. 8.5

B. 8

C. 9

D. 7.5

Correct Answer: Option B

Explanation:
Sum of first n odd = n^2 =64. Average=64/8=8.

This question belongs to: Maths Average

Question #3 Report Error

Average of 12 numbers 1520. If average of 8 is 1515, average of remaining 4?

A. 1525

B. 1532

C. 1530

D. 1528

Correct Answer: Option C

Explanation:
Sum12=18240. Sum8=12120. Remaining=6120. Average=1530.

This question belongs to: Maths Average