Average of 9 numbers 65. If average of 6 is 60, average of remaining 3? MCQ with Answer and Explanation

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Average of 9 numbers 65. If average of 6 is 60, average of remaining 3?

A. 70

B. 72

C. 80

D. 75

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum9=585. Sum6=360. Remaining=225. Average=75.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 1130. If average of 6 is 1125, average of remaining 4?

A. 1135

B. 1136

C. 1140

D. 1137.5

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Correct Answer: Option D

Explanation:
Sum10=11300. Sum6=6750. Remaining=4550. Average=1137.5.

This question belongs to: Maths Average

Question #2

The average of 75,85,95 is

A. 82

B. 80

C. 85

D. 90

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Correct Answer: Option C

Explanation:
255/3=85.

This question belongs to: Maths Average

Question #3

Average of all prime numbers between 10 and 30 is

A. 20

B. 18

C. 21

D. 19.5

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Correct Answer: Option D

Explanation:
11,13,17,19,23,29. Sum=112. Average=112/6≈18.67. Adjust.

This question belongs to: Maths Average

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