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. 818

B. 820

C. 815

D. 817.5

Answer: Option D

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

The average of 4 numbers is 18. If one number is 22, find the average of the remaining 3.

A. 17.33

B. 17

C. 16

D. 16.67

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Correct Answer: Option D

Explanation:
Sum=4×18=72. Remaining sum=72-22=50. Avg=50/3=16.67.

This question belongs to: Maths Average

Question #2

Average of 8 numbers 1950. If average of 5 is 1945, average of remaining 3?

A. 1960

B. 1957

C. 1955

D. 1958.33

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Correct Answer: Option D

Explanation:
Sum8=15600. Sum5=9725. Remaining=5875. Average≈1958.33.

This question belongs to: Maths Average

Question #3

Average of 10 numbers 430. If average of 6 is 425, average of remaining 4?

A. 440

B. 435

C. 437.5

D. 436

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Correct Answer: Option C

Explanation:
Sum10=4300. Sum6=2550. Remaining=1750. Average=437.5.

This question belongs to: Maths Average

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