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Question

The average weight of 8 persons increases by 2.5kg when a new person comes in place of one of them weighing65kg. What might be the weight of the new person ?


A

76kg

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B

85kg

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C

76.5kg

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D

Data inadequate

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Solution

The correct option is B

85kg


Explanation for correct answer.

We have,

Total number of person =8

Increased in average weight =2.5kg

So, the total weight increased =8×2.5kg=20kg

Now,

Weight of replaced person=65kg

So, the Weight of a new person is

=65+8×2.5=65+20=85kg

Thus, the Weight of a new person is 85kg

Hence, option B is correct.


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