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

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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

Answer: Option C

Solution (By JKSSB Mock Tests)

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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Question #1

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Average of 10 numbers 2080. If average of 6 is 2075, average of remaining 4?

A. 2086

B. 2085

C. 2087.5

D. 2090

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Correct Answer: Option C

Explanation:
Sum10=20800. Sum6=12450. Remaining=8350. Average=2087.5.

This question belongs to: Maths Average

Question #2

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The average of 7 numbers is 29. If each number is multiplied by 3, what is the new average?

A. 58

B. 86

C. 29

D. 87

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Correct Answer: Option D

Explanation:
New average =29×3=87.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 55. If average of 6 is 50, average of remaining 4?

A. 62.5

B. 60

C. 65

D. 63

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Correct Answer: Option A

Explanation:
Sum10=550. Sum6=300. Remaining=250. Average=62.5.

This question belongs to: Maths Average

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