Average of a,b is 10, average of b,c is 12, average of c,a is 14. Find a. MCQ with Answer and Explanation

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Average of a,b is 10, average of b,c is 12, average of c,a is 14. Find a.

A. 10

B. 8

C. 14

D. 12

Answer: Option D

Solution (By JKSSB Mock Tests)

a+b=20, b+c=24, c+a=28. Add all 2(a+b+c)=72, a+b+c=36. a=36-24=12.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 2380. If average of 6 is 2375, average of remaining 4?

A. 2386

B. 2390

C. 2385

D. 2387.5

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Correct Answer: Option D

Explanation:
Sum10=23800. Sum6=14250. Remaining=9550. Average=2387.5.

This question belongs to: Maths Average

Question #2

Average of 9 consecutive numbers is 45. Largest?

A. 50

B. 48

C. 47

D. 49

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Correct Answer: Option D

Explanation:
Largest=45+4=49.

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Question #3

Average of 15 numbers 860. If average of 9 is 855, average of remaining 6?

A. 868

B. 870

C. 865

D. 867.5

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Correct Answer: Option D

Explanation:
Sum15=12900. Sum9=7695. Remaining=5205. Average=867.5.

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