The average marks of 20 students is 75. If a student with 90 marks leaves, what is the new average? MCQ with Answer and Explanation

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The average marks of 20 students is 75. If a student with 90 marks leaves, what is the new average?

A. 74.0

B. 73.5

C. 74.21

D. 75.0

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum=20×75=1500. New sum=1500-90=1410. New average=1410/19=74.21.

This question belongs to: Maths Average

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Question #1

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Average of 8 numbers 1550. If average of 5 is 1545, average of remaining 3?

A. 1560

B. 1557

C. 1558.33

D. 1555

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Correct Answer: Option C

Explanation:
Sum8=12400. Sum5=7725. Remaining=4675. Average≈1558.33.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 2320. If average of 8 is 2315, average of remaining 4?

A. 2328

B. 2332

C. 2330

D. 2325

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Correct Answer: Option C

Explanation:
Sum12=27840. Sum8=18520. Remaining=9320. Average=2330.

This question belongs to: Maths Average

Question #3

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Average of 1425,1900,2375 is

A. 1900

B. 1910

C. 1890

D. 1895

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Correct Answer: Option A

Explanation:
5700/3=1900.

This question belongs to: Maths Average

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