A family of 4 brothers and 3 sisters is to be arranged for a photograph in one row. In how many ways can they be seated if
(i) all the sisters sit together
(ii) No 2 sisters sit together

• i)
  3! because three sister site together
  5! because 4 boy and group of girls
  3!*5!
  
  ii)
  total arrangement is 7!
  not set together means 7!-3!5!
• 7 years agoHelpfull: Yes(1) No(0)