The average of first 8 multiples of 5 is MCQ with Answer and Explanation

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The average of first 8 multiples of 5 is

A. 25

B. 30

C. 20

D. 22.5

Answer: Option D

Solution (By JKExamLibrary)

5*(1+8)/2=22.5.

This question belongs to: Maths Average

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Question #1

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

A. 2407

B. 2405

C. 2410

D. 2408.33

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Correct Answer: Option D

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

This question belongs to: Maths Average

Question #2

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The average of 8 numbers is 22. If each number is decreased by 2, what is the new average?

A. 20

B. 18

C. 24

D. 22

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Correct Answer: Option A

Explanation:
New average =22-2=20.

This question belongs to: Maths Average

Question #3

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Average temperature for Monday to Wednesday was 40°C. Average for Tuesday to Thursday was 41°C. Thursday temperature was 42°C. What was Monday's temperature?

A. 39

B. 40

C. 38

D. 41

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Correct Answer: Option A

Explanation:
Let M,T,W,Th. (M+T+W)/3=40. (T+W+Th)/3=41, Th=42. From second: T+W=123-42=81. First: M+81=120, M=39.

This question belongs to: Maths Average

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