There are 7 boys and 8 girls in the school dance team. Now we need to select 3 people from these people to participate in the dance competition. What is the probability that exactly 1 boy and 2 girls are selected?
学校舞蹈队有7名男生，8名女生，现在要从这些人中选出3人参加舞蹈比赛，恰好选出1名男生和2名女生的概率是多少．
<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">56 / 2</gadget>
<output>28</output>

<gadget id="calculator">7 * 28</gadget>
<output>196</output>

<gadget id="calculator">15 * 14 * 13</gadget>
<output>2_730</output>

<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<gadget id="calculator">2_730 / 6</gadget>
<output>455</output>

<gadget id="calculator">196 / 455</gadget>
<output>28/65 = around 0.430769</output>

<result>28/65 = around 0.430769</result>