If average of a and b is 10, b and c is 15, c and a is 20, average of a,b,c is MCQ with Answer and Explanation

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If average of a and b is 10, b and c is 15, c and a is 20, average of a,b,c is

A. 15

B. 13

C. 14

D. 16

Answer: Option A

Solution (By JKSSB Mock Tests)

Adding all: 2(a+b+c)=90, a+b+c=45. Average=15.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Average of 9 numbers 2740. If average of 6 is 2735, average of remaining 3?

A. 2745

B. 2755

C. 2748

D. 2750

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Correct Answer: Option D

Explanation:
Sum9=24660. Sum6=16410. Remaining=8250. Average=2750.

This question belongs to: Maths Average

Question #2

Average of 15 numbers 510. If average of 9 is 505, average of remaining 6?

A. 520

B. 515

C. 518

D. 517.5

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Correct Answer: Option D

Explanation:
Sum15=7650. Sum9=4545. Remaining=3105. Average=517.5.

This question belongs to: Maths Average

Question #3

Average of 15 numbers 32. If average of 9 is 30, average of remaining 6?

A. 36

B. 33

C. 35

D. 34

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Correct Answer: Option C

Explanation:
Sum15=480. Sum9=270. Remaining=210. Average=35.

This question belongs to: Maths Average

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