The school’s Xinlei Broadcasting Station needs to choose a male host and a female host from among 3 boys and 4 girls. How many different ways can there be? Wang Ping is one of the girls, and the probability of being selected is (( ())/(())).
学校新蕾广播台要在3名男生和4名女生中，挑选男、女主持人各一名，共有多少种不同的选法；王萍是女生中的一个，被选中的可能性是((())/(()))．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>