Final answer:
To choose 2 out of 7 toppings for a pizza, there are 21 different ways to do so using combinations.
Explanation:
To find the number of different ways to choose 2 out of 7 toppings for a pizza, we use combination formula C(n, k) = n! / (k!(n-k)!). In this case, n=7 (total toppings) and k=2 (toppings to choose). Calculating, we get C(7,2) = 21.
Learn more about Combinations in Mathematics here:
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