Posted by **Steph** on Thursday, September 13, 2012 at 10:56pm.

If there are 5 teams in one league and 6 teams in another league and if each team from one league plays one team from the other league once how many games are played?

- Math -
**Reiny**, Friday, September 14, 2012 at 12:31am
visualize the first set of teams as

a b c d e

and the second set of teams as

1 2 3 4 5 6

so we have

a1 a2 a3 a4 a5 a6

b1 b2................b6

....

e1 .....................e6

that would be 30 games

or

we have to choose one from each group

number of games = C(5,1) * C(6,1) = 5*6 = 30

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