The average of 990,1320,1650 is MCQ with Answer and Explanation

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The average of 990,1320,1650 is

A. 1330

B. 1315

C. 1320

D. 1310

Answer: Option C

Solution (By JKSSB Mock Tests)

3960/3=1320.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 810. If average of 9 is 805, average of remaining 6?

A. 818

B. 815

C. 817.5

D. 820

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Correct Answer: Option C

Explanation:
Sum15=12150. Sum9=7245. Remaining=4905. Average=817.5.

This question belongs to: Maths Average

Question #2

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Average of all prime numbers between 10 and 30 is

A. 21

B. 18

C. 19.5

D. 20

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Correct Answer: Option C

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

This question belongs to: Maths Average

Question #3

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Average of 9 numbers 1540. If average of 6 is 1535, average of remaining 3?

A. 1545

B. 1555

C. 1550

D. 1548

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Correct Answer: Option C

Explanation:
Sum9=13860. Sum6=9210. Remaining=4650. Average=1550.

This question belongs to: Maths Average

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