Ans: B
Let $\$x$ be the cost of the car. Then the marked price of the car
Let $\$x$ be the cost of the car. Then the marked price of the car
$\begin{array}{cl}
= & x(1+50\%) \\
= & \$1.5x
\end{array}$
and the selling price of the car
$\begin{array}{cl}
= & 1.5x \times (1-0.8) \\
= & \$1.2x
\end{array}$
Therefore, the percentage profit
$\begin{array}{cl}
= & \dfrac{1.2x – x}{x} \times 100\% \\
= & \dfrac{0.2x}{x} \times 100\% \\
= & 20\%
\end{array}$
