Average of 12 numbers 670. If average of 8 is 665, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 670. If average of 8 is 665, average of remaining 4?

A. 682

B. 678

C. 680

D. 675

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=8040. Sum8=5320. Remaining=2720. Average=680.

This question belongs to: Maths Average

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Question #1

Average of 28,35,42 is

A. 30

B. 40

C. 35

D. 33

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Correct Answer: Option C

Explanation:
105/3=35.

This question belongs to: Maths Average

Question #2

Average of 1 to 25 is

A. 13.5

B. 13

C. 12.5

D. 12

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Correct Answer: Option B

Explanation:
(25+1)/2=13.

This question belongs to: Maths Average

Question #3

The average of 5 numbers is 24. If one number is excluded, the average of the remaining 4 numbers becomes 20. What is the excluded number?

A. 44

B. 48

C. 40

D. 36

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Correct Answer: Option C

Explanation:
Total of 5 numbers = 5×24 = 120. Total of remaining 4 numbers = 4×20 = 80. Excluded number = 120−80 = 40.

This question belongs to: Maths Average

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