The average of 8 numbers is 40. If one number is 20, find the average of the remaining 7. MCQ with Answer and Explanation

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The average of 8 numbers is 40. If one number is 20, find the average of the remaining 7.

A. 42.86

B. 42

C. 43

D. 41.5

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=8×40=320. Remaining sum=320-20=300. Avg=300/7=42.86.

This question belongs to: Maths Average

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Question #1

Average of 12 numbers 1220. If average of 8 is 1215, average of remaining 4?

A. 1225

B. 1230

C. 1232

D. 1228

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Correct Answer: Option B

Explanation:
Sum12=14640. Sum8=9720. Remaining=4920. Average=1230.

This question belongs to: Maths Average

Question #2

Average of 15 numbers 1410. If average of 9 is 1405, average of remaining 6?

A. 1418

B. 1420

C. 1415

D. 1417.5

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Correct Answer: Option D

Explanation:
Sum15=21150. Sum9=12645. Remaining=8505. Average=1417.5.

This question belongs to: Maths Average

Question #3

Average of 20 numbers 90. If average of 12 is 85, average of remaining 8?

A. 97.5

B. 95

C. 100

D. 96

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Correct Answer: Option A

Explanation:
Sum20=1800. Sum12=1020. Remaining=780. Average=97.5.

This question belongs to: Maths Average

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