The average of 10 numbers is 21. If one number is 30, find the average of the remaining 9. MCQ with Answer and Explanation

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The average of 10 numbers is 21. If one number is 30, find the average of the remaining 9.

A. 19.5

B. 19

C. 20

D. 20.5

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum=10×21=210. Remaining sum=210-30=180. Avg=180/9=20.

This question belongs to: Maths Average

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Correct Answer: Option D

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