Average of 12 numbers 2670. If average of 8 is 2665, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 2670. If average of 8 is 2665, average of remaining 4?

A. 2675

B. 2678

C. 2680

D. 2682

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=32040. Sum8=21320. Remaining=10720. Average=2680.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

The average of 5 numbers is 25. If one number is 35, find the average of the remaining 4.

A. 22

B. 23

C. 22.5

D. 24

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Correct Answer: Option C

Explanation:
Sum=5×25=125. Remaining sum=125-35=90. Avg=90/4=22.5.

This question belongs to: Maths Average

Question #2

Find the average of the first 5 multiples of 6.

A. 18

B. 20

C. 15

D. 16

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Correct Answer: Option A

Explanation:
Multiples:6,12,18,24,30 sum=90, count=5, avg=18.

This question belongs to: Maths Average

Question #3

A person covers 2/3 distance at 30 km/h and 1/3 at 60 km/h. Average speed?

A. 35 km/h

B. 45 km/h

C. 36 km/h

D. 40 km/h

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Correct Answer: Option C

Explanation:
Let distance 3d. Time = (2d/30) + (d/60) = (4d + d)/60 =5d/60. Average =3d / (5d/60) =36.

This question belongs to: Maths Average

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