Average of 20 numbers is 45. Later two numbers 30 and 50 replaced by 40 and 60, new average? MCQ with Answer and Explanation

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Average of 20 numbers is 45. Later two numbers 30 and 50 replaced by 40 and 60, new average?

A. 45

B. 44

C. 47

D. 46

Answer: Option D

Solution (By JKExamLibrary)

Net change +20. Increase 1. New average=46.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 8 numbers 1900. If average of 5 is 1895, average of remaining 3?

A. 1907

B. 1908.33

C. 1910

D. 1905

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Correct Answer: Option B

Explanation:
Sum8=15200. Sum5=9475. Remaining=5725. Average≈1908.33.

This question belongs to: Maths Average

Question #2 Report Error

Average of 40 numbers 30. If 10 numbers average 40, average of remaining 30?

A. 25

B. 28

C. 27

D. 26.67

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Correct Answer: Option D

Explanation:
Total=1200. 10=400. Remaining=800/30≈26.67.

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Question #3 Report Error

The average of 360,480,600 is

A. 480

B. 475

C. 490

D. 470

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Correct Answer: Option A

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1440/3=480.

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