In how many different ways can 5 boys and 3 girls sit on a bench such that the girls always sit together? Choose the correct choice from the following choices:
A) 360	B) 720	C) 1440	D) 4320	E) 5040
We can think of the girls as one unit.   The number of ways to arrange 6 units in order is 6!   The girls can have different arrangements, so we multiply this by 3!   The number of ways to sit is 6!*2!=4320   The answer is 4320.
<result>D</result>
In how many different ways can 5 boys and 3 girls sit on a bench such that the girls always sit together?