The average weight of 4 persons increases by 3 kg when a person of 53 kg is replaced by a new person. The weight (in kg) of the new person is :

Correct option is B

Given:

Increase in average weight = 3 kg

Number of persons = 4

Weight of the person replaced = 53 kg

Formula Used:

Total increase in weight = Increase in average × Number of persons

Weight of new person = Weight of replaced person + Total increase in weight

Solution:

Total increase in weight = $$3 \times 4 = 12 \text{ kg}$$​​

Weight of new person = $$53 + 12 = 65 \text{ kg}$$​​

The weight of the new person is $$65 \text{ kg}.$$​​