6 seats are available around the table but only 4 people are having dinner.
In how many different ways can these people sit ?
There are 50 people at a meeting. Every person shakes hands with everyone else.
How many handshakes were there?
Paul wants to set a passcode for his new safe coded box. The passcode has 4 digits and he can only use the numbers 3, 6, 9 and the letter c.
In how many ways can he set the passcode?
From a group of 6 men and 8 women, how many teams of 2 men and 3 women can be formed?
How many basketball teams of 5 players can be formed with 10 players without regard to position played?
A police station is choosing a captain and an assistant. There are 10 police officers at this station.
In how many ways can police officers be chosen for these two positions?