Determine the number of 5 cards combinations out of a deck of 52 cards if there is exactly one ace in each combination.

26

In how many ways can a team of 3 boys and 3 girls be selected from 5 boys and 4 girls?

27

Find the number of ways of selecting 9 balls from 6 red balls, 5 white balls and 5 blue balls if each selection consists of 3 balls of each colour.

29

In how many ways can we select a cricket of eleven from 17 players in which only 5 players can bowl if each cricket eleven must include exactly 4 bowlers?

30

A bag contains 5 black and 6 red balls. Determine the number of ways in which 2 black and 3 red balls can be selected.