In a class there are 20 boys and 20 girls. In how many ways can a boy and a girl be selected? Pick one.
A) 400  B) 500  C) 600  D) 530  E) 630
Explanation:   We can select one boy from 20 boys in 20 ways.   We select one girl from 20 girls in 20 ways   We select a boy and girl in 20 * 20 ways i.e., = 400 ways.   400nswer: Option 400
<result>A</result>
In a class there are 20 boys and 20 girls. In how many ways can a boy and a girl be selected?