In how many different number of ways 3 boys and 1 girls can sit on a bench?	Choose the correct option:
A) 24
B) 40
C) 60
D) 78
E) 80
npn = n!   4p4= 4 × 3 × 2 × 1 = 24   24)
<result>A</result>
In how many different number of ways 3 boys and 1 girls can sit on a bench?