答案：A
所求的概率
所求的概率
$\begin{array}{cl}
= & \dfrac{1}{5}\times \dfrac{2}{4} + \dfrac{1}{5} \times \dfrac{2}{4} + \dfrac{1}{5} \times \dfrac{2}{4} + \dfrac{1}{5} \times \dfrac{2}{4} \\
= & \dfrac{2}{5}
\end{array}$
