In how many different number of ways 4 boys and 3 girls can sit on a bench such that girls always sit together.
Choose the correct choice from the following answers:
A) 710  B) 720  C) 730  D) 740  E) 750
720   Option '720'
<result>B</result>
In how many different number of ways 4 boys and 3 girls can sit on a bench such that girls always sit together.