Question

There are 12 student in a party.five of them are girls.in how many ways can these 12 students be arranged in a row if
(I) there are no restriction
(ii)5 girls must be together (forming a block)
(iii) no 2 girls are adjacent
(iv)BTW 2 particular boys A and B,there are no boys but exactly 3 girls.

Answer 1

Answer

1. there are nor restriction

Answer 2

There no restrictions:

12!