Average of 10,15,20,25,30 is MCQ with Answer and Explanation

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Average of 10,15,20,25,30 is

A. 18

B. 25

C. 22

D. 20

Answer: Option D

Solution (By JKSSB Mock Tests)

100/5=20.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 760. If average of 9 is 755, average of remaining 6?

A. 765

B. 767.5

C. 770

D. 768

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Correct Answer: Option B

Explanation:
Sum15=11400. Sum9=6795. Remaining=4605. Average=767.5.

This question belongs to: Maths Average

Question #2

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The average of 5 numbers is 24. If two numbers 18 and 30 are excluded, average of remaining?

A. 22

B. 25

C. 26

D. 24

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Correct Answer: Option D

Explanation:
Sum5=120. Remaining sum=120-48=72. Average=72/3=24.

This question belongs to: Maths Average

Question #3

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The average of first 6 multiples of 7 is

A. 24.5

B. 25

C. 28

D. 21

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Correct Answer: Option A

Explanation:
7*(1+6)/2=7*3.5=24.5.

This question belongs to: Maths Average

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