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. 52 kg

B. 51 kg

C. 51.43 kg

D. 50.5 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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The average marks of 15 students is 80. If a student with 95 marks leaves, what is the new average?

A. 78.93

B. 78.5

C. 79

D. 79.5

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Correct Answer: Option A

Explanation:
Sum=15×80=1200. New sum=1200-95=1105. New avg=1105/14=78.93.

This question belongs to: Maths Average

Question #2

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Average of 7 consecutive odd numbers is 35. Largest number?

A. 41

B. 37

C. 43

D. 39

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Correct Answer: Option A

Explanation:
Middle=35. Largest=35+6=41.

This question belongs to: Maths Average

Question #3

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Average of 50 numbers 20. If numbers are decreased by 2 each, new average?

A. 22

B. 19

C. 20

D. 18

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Correct Answer: Option D

Explanation:
New average=20-2=18.

This question belongs to: Maths Average

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