Average of 25 students marks 80. If 5 students average 90, average of remaining 20? MCQ with Answer and Explanation

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Average of 25 students marks 80. If 5 students average 90, average of remaining 20?

A. 77.5

B. 78

C. 76

D. 75

Answer: Option A

Solution (By JKSSB Mock Tests)

Total=2000. 5=450. Remaining=1550/20=77.5.

This question belongs to: Maths Average

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Question #1

Average of 1065,1420,1775 is

A. 1430

B. 1415

C. 1420

D. 1410

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Correct Answer: Option C

Explanation:
4260/3=1420.

This question belongs to: Maths Average

Question #2

Average of 8 numbers 28. If average of 5 is 25, average of remaining 3?

A. 30

B. 33.33

C. 35

D. 32

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Correct Answer: Option B

Explanation:
Sum8=224. Sum5=125. Remaining=99. Average=33.

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Question #3

Average of 9 numbers 2340. If average of 6 is 2335, average of remaining 3?

A. 2350

B. 2355

C. 2348

D. 2345

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Correct Answer: Option A

Explanation:
Sum9=21060. Sum6=14010. Remaining=7050. Average=2350.

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