A PIZZA PARLOR HAS A CHOICE OF 13 TOPPINGS FOR ITS PIZZAS. fROM THESE 13 TOPPINGS MANY DIFFERENT 2-TOPPINGS PIZZAS CAN BE ORDERD? aSSUME THAT THE ORDER IN WHICH TOPPINGS ARE LISTED DOES NOT MATTER.

- jaybird0827
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SHANIE3 wrote:A PIZZA PARLOR HAS A CHOICE OF 13 TOPPINGS FOR ITS PIZZAS. fROM THESE 13 TOPPINGS MANY DIFFERENT 2-TOPPINGS PIZZAS CAN BE ORDERD? aSSUME THAT THE ORDER IN WHICH TOPPINGS ARE LISTED DOES NOT MATTER.

This is a simple problem in combinations. You want to

13C2

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