Question 64283
You have pepperoni, mushrooms, onions, and green peppers.  How many different pizzas can you make by using one, two, three, or four of the toppings?
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One topping: 4C1=4 pizzas
two topping: 4C2=6 pizzas
three tops:  4C3=4 pizzas
four tops:   4C4=1 pizza
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Cheers,
Stan H.