The average of first 20 natural numbers is MCQ with Answer and Explanation

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The average of first 20 natural numbers is

A. 11

B. 9.5

C. 10.5

D. 10

Answer: Option C

Solution (By JKExamLibrary)

(20+1)/2=10.5.

This question belongs to: Maths Average

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Question #1

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Average of 12 numbers 100. If average of 8 is 95, average of remaining 4?

A. 108

B. 112

C. 105

D. 110

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Correct Answer: Option D

Explanation:
Sum12=1200. Sum8=760. Remaining=440. Average=110.

This question belongs to: Maths Average

Question #2

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The average of 3 numbers is 15. If each number is multiplied by 4, what is the new average?

A. 60

B. 75

C. 30

D. 45

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Correct Answer: Option A

Explanation:
New average =15×4=60.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 1980. If average of 6 is 1975, average of remaining 4?

A. 1985

B. 1987.5

C. 1990

D. 1986

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Correct Answer: Option B

Explanation:
Sum10=19800. Sum6=11850. Remaining=7950. Average=1987.5.

This question belongs to: Maths Average

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