Average of 15 numbers 810. If average of 9 is 805, average of remaining 6? MCQ with Answer and Explanation

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

A. 820

B. 818

C. 817.5

D. 815

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Average

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Question #1

If average of 8 and 12 is 10 and average of 12 and x is 15, x is

A. 18

B. 15

C. 16

D. 20

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Correct Answer: Option A

Explanation:
12 + x =30. x=18.

This question belongs to: Maths Average

Question #2

The average of 63,72,81 is

A. 75

B. 68

C. 70

D. 72

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Correct Answer: Option D

Explanation:
216/3=72.

This question belongs to: Maths Average

Question #3

Average of 15 numbers 360. If average of 9 is 355, average of remaining 6?

A. 370

B. 367.5

C. 368

D. 365

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Correct Answer: Option B

Explanation:
Sum15=5400. Sum9=3195. Remaining=2205. Average=367.5.

This question belongs to: Maths Average

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