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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