A sports card collection contains 20 baseball players, 15 basket ball players and 25 football players. In how many ways can you select one of each?
7,5000 different possibilities.
You could choose anywhere from card 1-20 out of the baseball-player cards. (20 different possibilities)
Then, you could choose anywhere from 1-15 out of the basketball-player cards, in addition to the 20 different possibilities of baseball-player cards (15*20 different possibilities)
Finally, you could choose anywhere from cards 1-25 of the football-player cards, in addition to the 15 different possibilities of the basketball-player cards, IN ADDITION to the 20 different possibilities of the baseball-player cards. (15*20*25) = 7,500 different posibilities.
At least I think this is how you do it...
