In how many different number of ways 4 boys and 2 girls can sit on a bench?  Pick
A) 700 B) 720 C) 780 D) 800 E) 810
npn = n!   6p6 = 6 × 5 × 4 × 3 × 2 × 1 = 720   720
<result>B</result>
In how many different number of ways 4 boys and 2 girls can sit on a bench?