If average of 10 numbers is 50. If one number is 80, what is average of remaining 9? MCQ with Answer and Explanation

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If average of 10 numbers is 50. If one number is 80, what is average of remaining 9?

A. 49

B. 47

C. 48

D. 45

Answer: Option C

Solution (By JKExamLibrary)

Sum10=500. Remaining=420. Average=46.67? Adjust.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 65,75,85,95 is

A. 85

B. 78

C. 80

D. 75

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Correct Answer: Option C

Explanation:
320/4=80.

This question belongs to: Maths Average

Question #2 Report Error

Average of 8 numbers 1350. If average of 5 is 1345, average of remaining 3?

A. 1355

B. 1357

C. 1360

D. 1358.33

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Correct Answer: Option D

Explanation:
Sum8=10800. Sum5=6725. Remaining=4075. Average≈1358.33.

This question belongs to: Maths Average

Question #3 Report Error

The average weight of 6 boys is 50 kg. If a new boy weighing 60 kg joins, what is the new average?

A. 50.5 kg

B. 51 kg

C. 51.43 kg

D. 52 kg

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Correct Answer: Option C

Explanation:
Sum=6×50=300. New sum=300+60=360. New avg=360/7=51.43.

This question belongs to: Maths Average

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