The product of x and y is a constant. If the value of x is increased by 50% by what percentage must the value of y be decreased?

The product of x and y is a constant. If the value of x is increased by 50% by what percentage must the value of y be decreased?

A 33(1/3)%

B 25%

C 20%

D 50%

Solution

Correct Answer: Option A

supppose, y decreased a% here (x+.5x) (y- ay)=xy 1.5x . y(1-a) =xy or. a= 100/3