SOLUTION: How many different 4-topping pizzas can be made if there are 13 individual toppings to 14) choose from? Assume that no topping is used more than once and that the order of the top

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Question 1083515: How many different 4-topping pizzas can be made if there are 13 individual toppings to 14) choose from? Assume that no topping is used more than once and that the order of the
toppings on the pizza is unimportant.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
This is a combination of 13 things taken 4 at a time
C( 13, 4 ) = +13%21+%2F+%28+4%21%2A%28+13+-+4+%29%21+%29+
C( 13, 4 ) = +13%21+%2F+%28+4%21%2A9%21+%29+
C( 13,4 ) = +%28+13%2A12%2A11%2A10+%29+%2F+%28+4%2A3%2A2%2A1+%29+
C( 13,4 ) = +17160+%2F+24+
C( 13,4 ) = +715+
There are 715 different 4-topping pizzas
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