The average of all natural numbers from 1 to 40 is MCQ with Answer and Explanation

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The average of all natural numbers from 1 to 40 is

A. 20.5

B. 21

C. 19.5

D. 20

Answer: Option A

Solution (By JKSSB Mock Tests)

(40+1)/2=20.5.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 610. If average of 9 is 605, average of remaining 6?

A. 620

B. 617.5

C. 615

D. 618

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Correct Answer: Option B

Explanation:
Sum15=9150. Sum9=5445. Remaining=3705. Average=617.5.

This question belongs to: Maths Average

Question #2

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Average of 10 numbers 1930. If average of 6 is 1925, average of remaining 4?

A. 1937.5

B. 1936

C. 1940

D. 1935

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Correct Answer: Option A

Explanation:
Sum10=19300. Sum6=11550. Remaining=7750. Average=1937.5.

This question belongs to: Maths Average

Question #3

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The average of 10 numbers is 14. If each number is decreased by 3, what is the new average?

A. 8

B. 14

C. 17

D. 11

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Correct Answer: Option D

Explanation:
New average =14-3=11.

This question belongs to: Maths Average

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