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Center of Mass as an Average Point

The average w...

Question

The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

A

76

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B

76.5

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C

85

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D

Data Insufficient

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Solution

The correct option is C
85

Total weight increased = (8 x 2.5) kg = 20 kg.

Weight of new person = (65 + 20) kg = 85 kg.

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