In how many different ways can 4 boys and 2 girls sit on a bench such that the girls always sit together?
Choose the correct choice from the following choices.
A) 240	B) 280	C) 320	D) 360	E) 400
We can think of the girls as one unit.   The number of ways to arrange 5 units in order is 5!   The girls can have different arrangements, so we multiply this by 2!   The number of ways to sit is 5!*2!=240   The answer is 240.
<result>A</result>
In how many different ways can 4 boys and 2 girls sit on a bench such that the girls always sit together?