In how many ways 4 boys and 3 girls can be seated in a row so that they are alternative? Pick:
A) 120	B) 144	C) 160	D) 210	E) 180
4 boys can be seated in 4!   three girls can be seated in 3!   Required number = 4!3! = 144   Answer is 144
<result>B</result>
In how many ways 4 boys and 3 girls can be seated in a row so that they are alternative?