This is your question number 2 for today, out of 5 allowed.

Question

Here's your question for category 'Probability-and-statistics'.
16 teams decided to participate in a football competition. In the preliminary round, the 16 teams will br divided into 4 groups and they have to compete with each other within group. The winner of the group will proceed to the semifinal.

Find the number of ways to form the 4 groups.

(Answer: 63063000)

Answer 1

C(16,4) = 16! / [ (16-4)!(4!) ]

=16*15*14*13/(4*3*2)

= 4 * 5 * 7 * 13

= 1280

Oh well