Average of 18 numbers 60. If 6 numbers average 70, average of remaining 12? MCQ with Answer and Explanation

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Average of 18 numbers 60. If 6 numbers average 70, average of remaining 12?

A. 56

B. 55

C. 50

D. 58

Answer: Option B

Solution (By JKSSB Mock Tests)

Total=1080. 6=420. Remaining=660/12=55.

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. 2387.5

B. 2390

C. 2385

D. 2386

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Correct Answer: Option A

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

This question belongs to: Maths Average

Question #2

Average of 10,15,20,25,30,35,40 is

A. 25

B. 26

C. 22.5

D. 24

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Correct Answer: Option A

Explanation:
Sum=175. Average=25.

This question belongs to: Maths Average

Question #3

The average of 6 numbers is 29. If one number is 34, find the average of the remaining 5.

A. 27.8

B. 28

C. 27.6

D. 28.2

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Correct Answer: Option B

Explanation:
Sum=6×29=174. Remaining sum=174-34=140. Avg=140/5=28.

This question belongs to: Maths Average

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