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April 20, 2015

Homework Help: dwyer

Posted by tyler on Tuesday, April 17, 2007 at 4:18pm.

how do i start to solve this
Harry has a choice of a veggie burge and a regular pizza
he can have three toppings his choices are
lettuce pickles onions tomatos and sprouts that is five items
how many combinations can he have
I think i multiply 5 x 3 and get 15 can you tell me is this right

First topping:

5 choices
sEcond choices 4 toppings
third choice 3 toppings

Answer: 5*4*3

nCr= N!/(n-r)!

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