Question

a family of four brothers and sisters is to parents for a photograph in one row in how many ways can be stated if no two sisters sit together

Answer 1

Answer:

All the sisters sit together can be taken as 1 unit the 4 brothers & 1 unit of sister can be seated in 5! ways for each of the sisters, who are together can be done in 3! ways.

∴ The number of ways = 5! 3!.