Average of 7,14,21,28,35,42,49 is MCQ with Answer and Explanation

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Average of 7,14,21,28,35,42,49 is

A. 30

B. 35

C. 28

D. 25

Answer: Option C

Solution (By JKSSB Mock Tests)

7 times (1 to 7). Average 7*4=28.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 1660. If average of 9 is 1655, average of remaining 6?

A. 1665

B. 1670

C. 1668

D. 1667.5

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Correct Answer: Option D

Explanation:
Sum15=24900. Sum9=14895. Remaining=10005. Average=1667.5.

This question belongs to: Maths Average

Question #2

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Average of 30,60,90,120 is

A. 75

B. 70

C. 85

D. 80

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Correct Answer: Option A

Explanation:
300/4=75.

This question belongs to: Maths Average

Question #3

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The average of 3 numbers is 12. If the first is 10 and the second is 15, find the third.

A. 13

B. 9

C. 12

D. 11

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Correct Answer: Option D

Explanation:
Sum=3×12=36. Third=36-10-15=11.

This question belongs to: Maths Average

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