The average weight of 4 men is incresed by 3kg when one of the m weighs 120 replaced by another man .what is the weight of new man?
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Let the average of four men be x
Total weight will be :
4x
When it increases by 3 we have :
x + 3
Total weight will be :
4(x + 3) = 4x + 12
The difference in the total weights is :
4x + 12 - 4x = 12
The new person weighs :
120 + 12 = 132
132 in weight.
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