There are 5 students in a certain group, including 3 girls and 2 boys, and now 2 are randomly selected from this group to serve as the leader and deputy leader respectively, what is the probability that the leader of the group is a boy?
某小组有5名学生，其中3名女生、2名男生，现从这个小组中任意选出2名分别担任正、副组长，则正组长是男生的概率是多少．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">8 / 20</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>