In the expression xy2, the values of both variables x and

In the expression xy², the values of both variables x and y are decreased by 20%. By this, the value of the expression is decreased by

1. 40%
2. 80%
3. 48.8%
4. 51.2%

Correct Option: C

Let x = 10 and y = 10
∴ xy² = 10 × 10 × 10=1000 units
Decreasing values of x and y by 20%,
Expression = xy² = 8 × 8 × 8 = 512
Decrease= 1000–512 = 488 units
Percentage decrease

=	488	× 100 = 48.8%
	1000

Percentage

Aptitude

Correct Option: C