Average of 12 numbers 75. If average of 7 is 70, average of remaining 5? MCQ with Answer and Explanation

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Average of 12 numbers 75. If average of 7 is 70, average of remaining 5?

A. 80

B. 85

C. 82

D. 78

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=900. Sum7=490. Remaining=410. Average=82.

This question belongs to: Maths Average

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Question #1

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The average of 10 numbers is 15. If each number is increased by 10, what is the new average?

A. 30

B. 20

C. 15

D. 25

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Correct Answer: Option D

Explanation:
New average =15+10=25.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 100. If average of 8 is 95, average of remaining 4?

A. 112

B. 105

C. 108

D. 110

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Correct Answer: Option D

Explanation:
Sum12=1200. Sum8=760. Remaining=440. Average=110.

This question belongs to: Maths Average

Question #3

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Average of 12 numbers 2570. If average of 8 is 2565, average of remaining 4?

A. 2578

B. 2580

C. 2575

D. 2582

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Correct Answer: Option B

Explanation:
Sum12=30840. Sum8=20520. Remaining=10320. Average=2580.

This question belongs to: Maths Average

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