If average of 9 numbers is 30 and average of 6 is 28, average of remaining 3? MCQ with Answer and Explanation

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If average of 9 numbers is 30 and average of 6 is 28, average of remaining 3?

A. 34

B. 33

C. 35

D. 32

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum9=270. Sum6=168. Remaining=102. Average=34.

This question belongs to: Maths Average

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Question #1

The average of 63,72,81 is

A. 70

B. 75

C. 72

D. 68

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Correct Answer: Option C

Explanation:
216/3=72.

This question belongs to: Maths Average

Question #2

The average weight of 25 students is 50 kg. If the weight of teacher is included, average increases by 1 kg. What is teacher's weight?

A. 76

B. 80

C. 75

D. 74

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Correct Answer: Option A

Explanation:
Total students weight=1250. New total for 26=26×51=1326. Teacher=1326-1250=76 kg.

This question belongs to: Maths Average

Question #3

The average of 1080,1440,1800 is

A. 1440

B. 1450

C. 1435

D. 1430

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Correct Answer: Option A

Explanation:
4320/3=1440.

This question belongs to: Maths Average

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