Average of 10 numbers 830. If average of 6 is 825, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 830. If average of 6 is 825, average of remaining 4?

A. 840

B. 836

C. 835

D. 837.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum10=8300. Sum6=4950. Remaining=3350. Average=837.5.

This question belongs to: Maths Average

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Question #1

The average of 3 numbers is 28. If two numbers are 25 and 30, find the third.

A. 31

B. 26

C. 27

D. 29

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Correct Answer: Option D

Explanation:
Sum=3×28=84. Third =84-25-30=29.

This question belongs to: Maths Average

Question #2

Average of 1215,1620,2025 is

A. 1630

B. 1610

C. 1620

D. 1615

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Correct Answer: Option C

Explanation:
4860/3=1620.

This question belongs to: Maths Average

Question #3

If average of 4 numbers is x and average of 6 other is y, average of all 10 is

A. (4x + 6y)/10

B. (x + y)/2

C. (2x + 3y)/5

D. x + y

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Correct Answer: Option A

Explanation:
Total = 4x + 6y. Average = (4x + 6y)/10.

This question belongs to: Maths Average

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