Math Question!!!!!!!!!!!!!!!!!
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Math Question!!!!!!!!!!!!!!!!!

[From: ] [author: ] [Date: 11-05-05] [Hit: ]
2 I get 12, but when I take the permutation of 10,3 i get 720. If i multiply those numbers there to big to be an answer, please help me out.I dont want an answer i want to figure out wat im doing wrong thanks for all of the help.......
this is my problem A pizza place offers 4 different cheeses and 10 different toppings. In how many ways can a pizza be made with 2 cheese and 3 toppings?

660
680
700
720
ok so im supposed to take the two permutations of 4,2 and 10,3 and multiply them to get the answer. When I take the permutation of 4,2 I get 12, but when I take the permutation of 10,3 i get 720. If i multiply those numbers there to big to be an answer, please help me out.

I dont want an answer i want to figure out wat im doing wrong thanks for all of the help.

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You want to find all the COMBINATIONS rather than permutations (this means that cheese A with Toppings B and C will be the same as cheese A with toppings C and B-a permutation counts them as two different things)

So work out 4C2 x 10C3 rather than 4P2 x 10P3

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4c2 * 10c3 =
6 * 120 = 720
1
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