If the average of 6 numbers is 18 and average of 4 is 20, average of remaining 2 is MCQ with Answer and Explanation

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If the average of 6 numbers is 18 and average of 4 is 20, average of remaining 2 is

A. 14

B. 12

C. 15

D. 16

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum6=108. Sum4=80. Remaining sum=28. Average=14.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Find the average of all numbers divisible by 5 between 10 and 30 (inclusive).

A. 20

B. 22.5

C. 17.5

D. 20.5

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Correct Answer: Option A

Explanation:
Numbers: 10,15,20,25,30 sum=100, count=5, avg=20.

This question belongs to: Maths Average

Question #2

The average of 660,880,1100 is

A. 890

B. 875

C. 880

D. 870

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Correct Answer: Option C

Explanation:
2640/3=880.

This question belongs to: Maths Average

Question #3

The average weight of 6 persons is 65 kg. If a person weighing 80 kg joins, what is the new average?

A. 67.14 kg

B. 67.5 kg

C. 68 kg

D. 66.67 kg

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Correct Answer: Option A

Explanation:
Sum=6×65=390. New sum=390+80=470. New avg=470/7=67.14.

This question belongs to: Maths Average

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