The average of 6 numbers is 18. If one number is 30, find the average of the remaining 5. MCQ with Answer and Explanation

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The average of 6 numbers is 18. If one number is 30, find the average of the remaining 5.

A. 16

B. 16.8

C. 14.4

D. 15.6

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum=6×18=108. Remaining sum=108-30=78. Avg=78/5=15.6.

This question belongs to: Maths Average

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Question #1

Average of 12 numbers 1820. If average of 8 is 1815, average of remaining 4?

A. 1830

B. 1828

C. 1832

D. 1825

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Correct Answer: Option A

Explanation:
Sum12=21840. Sum8=14520. Remaining=7320. Average=1830.

This question belongs to: Maths Average

Question #2

Average of 6 consecutive multiples of 9 is 45. Smallest?

A. 36

B. 18

C. 45

D. 27

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Correct Answer: Option D

Explanation:
Numbers 27,36,45,54,63,72. Avg 49.5 no. Adjust.

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Question #3

Average of 8 numbers 350. If average of 5 is 345, average of remaining 3?

A. 355

B. 357

C. 358.33

D. 360

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Correct Answer: Option C

Explanation:
Sum8=2800. Sum5=1725. Remaining=1075. Average≈358.33.

This question belongs to: Maths Average

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