The average of 6 numbers is 12. If one number is 20, find the average of the rest. MCQ with Answer and Explanation

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The average of 6 numbers is 12. If one number is 20, find the average of the rest.

A. 10.4

B. 11

C. 9.6

D. 10

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=6×12=72. Rest sum=72-20=52. Average=52/5=10.4.

This question belongs to: Maths Average

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Question #1

Average of 8 numbers 1800. If average of 5 is 1795, average of remaining 3?

A. 1808.33

B. 1807

C. 1805

D. 1810

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Correct Answer: Option A

Explanation:
Sum8=14400. Sum5=8975. Remaining=5425. Average≈1808.33.

This question belongs to: Maths Average

Question #2

The average of 4 numbers is 20. If three numbers are 15,20,25, fourth is

A. 20

B. 25

C. 18

D. 22

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Correct Answer: Option A

Explanation:
Fourth=80-60=20.

This question belongs to: Maths Average

Question #3

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

A. 14

B. 8

C. 10

D. 12

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Correct Answer: Option D

Explanation:
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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