1

Determine the value of an expression at
\$x = 0.5\$ & \$y = 0.4 \$

\$ xy + 1/(xy) \$

2

Now substitute the values \$x = 0.5\$ & \$y = 0.4 \$ in the expression

\$ (0.5)(0.4) + 1/(0.5 * 0.2) \$

3

After simplification

\$ (0.5)\times(0.4) + 1/(0.5)\times(0.4) \$

4

After multiplication

\$ 0.2 + 1/(0.2) \$

5

Take LCM as '\$0.2\$'

\$ (0.04 + 1)/0.2 \$

6

After simplification

\$ 1.04/0.2 \$

7

After cancelation

\$ \cancel(1.04)^5.2/\cancel(0.2) \$

8

Answer

B : \$ 5.2 \$