SOLUTION: kelly can select one or more of the following 4 toppings to put on his hamburger: cheese, onions, pickles, and tomatoes. if he selects one or more, how many different combinations

Question 836193: kelly can select one or more of the following 4 toppings to put on his hamburger: cheese, onions, pickles, and tomatoes. if he selects one or more, how many different combinations of toppings can he have?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
There are 2^4 = 16 ways he can select any combination of toppings (Kelly can select cheese or no cheese, onions or no onions, etc.). However this includes the case where he selects no toppings, so we subtract 1. 16 - 1 = 15 combinations.
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