Average of 8 numbers 2650. If average of 5 is 2645, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 2650. If average of 5 is 2645, average of remaining 3?

A. 2658.33

B. 2657

C. 2655

D. 2660

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum8=21200. Sum5=13225. Remaining=7975. Average≈2658.33.

This question belongs to: Maths Average

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Question #1

The average of 5 numbers is 29. If one number is 35, find the average of the remaining 4.

A. 28

B. 27

C. 27.5

D. 26.5

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Correct Answer: Option C

Explanation:
Sum=5×29=145. Remaining sum=145-35=110. Avg=110/4=27.5.

This question belongs to: Maths Average

Question #2

The average age of 10 friends is 25. If one 30 years old joins, new average?

A. 25.5

B. 25.45

C. 26

D. 24.5

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Correct Answer: Option B

Explanation:
Total=250. New=280/11≈25.45.

This question belongs to: Maths Average

Question #3

If average of 15 numbers is 40 and average of 10 is 45, average of remaining 5?

A. 25

B. 30

C. 32

D. 35

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Correct Answer: Option B

Explanation:
Sum15=600. Sum10=450. Remaining=150. Average=30.

This question belongs to: Maths Average

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