Average of 30 numbers 42. If average of 20 is 40, average of remaining 10? MCQ with Answer and Explanation

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Average of 30 numbers 42. If average of 20 is 40, average of remaining 10?

A. 45

B. 44

C. 46

D. 48

Answer: Option C

Solution (By JKSSB Mock Tests)

Total=1260. Sum20=800. Remaining=460. Average=46.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 2740. If average of 6 is 2735, average of remaining 3?

A. 2755

B. 2745

C. 2750

D. 2748

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Correct Answer: Option C

Explanation:
Sum9=24660. Sum6=16410. Remaining=8250. Average=2750.

This question belongs to: Maths Average

Question #2

Average of 4 numbers is 50. If three are 40,45,55, fourth is

A. 50

B. 55

C. 65

D. 60

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Correct Answer: Option D

Explanation:
Fourth=200-140=60.

This question belongs to: Maths Average

Question #3

Average of 8 numbers 1650. If average of 5 is 1645, average of remaining 3?

A. 1657

B. 1655

C. 1658.33

D. 1660

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Correct Answer: Option C

Explanation:
Sum8=13200. Sum5=8225. Remaining=4975. Average≈1658.33.

This question belongs to: Maths Average

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