In how many different number of ways 2 boys and 2 girls can sit on a bench?	Choose the correct choice from the following answers.
A) 72  B) 24  C) 76  D) 78  E) 28
npn = n!   4p4 = 4 × 3 × 2 × 1 = 24   24
<result>B</result>
In how many different number of ways 2 boys and 2 girls can sit on a bench?