Average of 10 numbers 1830. If average of 6 is 1825, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 1830. If average of 6 is 1825, average of remaining 4?

A. 1840

B. 1836

C. 1837.5

D. 1835

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum10=18300. Sum6=10950. Remaining=7350. Average=1837.5.

This question belongs to: Maths Average

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Question #1

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Average of 20 numbers is 45. Later two numbers 30 and 50 replaced by 40 and 60, new average?

A. 45

B. 44

C. 46

D. 47

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Correct Answer: Option C

Explanation:
Net change +20. Increase 1. New average=46.

This question belongs to: Maths Average

Question #2

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Average of 10 numbers 780. If average of 6 is 775, average of remaining 4?

A. 790

B. 785

C. 787.5

D. 786

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Correct Answer: Option C

Explanation:
Sum10=7800. Sum6=4650. Remaining=3150. Average=787.5.

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. 12

B. 11

C. 13

D. 9

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Correct Answer: Option B

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

This question belongs to: Maths Average

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