The average of 6 numbers is 21. If one number is 15, find the average of the remaining 5. MCQ with Answer and Explanation

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The average of 6 numbers is 21. If one number is 15, find the average of the remaining 5.

A. 22

B. 22.2

C. 21.4

D. 21.6

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=6×21=126. Remaining sum=126-15=111. Avg=111/5=22.2.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 1780. If average of 6 is 1775, average of remaining 4?

A. 1786

B. 1785

C. 1790

D. 1787.5

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Correct Answer: Option D

Explanation:
Sum10=17800. Sum6=10650. Remaining=7150. Average=1787.5.

This question belongs to: Maths Average

Question #2

Average of 12 numbers 1570. If average of 8 is 1565, average of remaining 4?

A. 1575

B. 1582

C. 1580

D. 1578

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Correct Answer: Option C

Explanation:
Sum12=18840. Sum8=12520. Remaining=6320. Average=1580.

This question belongs to: Maths Average

Question #3

Average of 15 numbers 2410. If average of 9 is 2405, average of remaining 6?

A. 2415

B. 2418

C. 2417.5

D. 2420

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Correct Answer: Option C

Explanation:
Sum15=36150. Sum9=21645. Remaining=14505. Average=2417.5.

This question belongs to: Maths Average

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