4 A rugby team of 15 people is to be selected from a squad of 25 players.
- How many different teams are possible?
- In fact the team has to consist of 8 forwards and 7 backs. If 13 of the squad are forwards and the other 12 are backs, how many different teams are now possible?
- Find the probability that, if the team is selected at random from the squad of 25 players, it contains the correct numbers of forwards and backs.