There are 8 choices of toppings, and we need to choose 2 distinct toppings. This is represented by the number of 2-element subsets of an 8 -element set. We use the binomial coefficient ${8 \choose 2} = \boxed{28}$ to compute this.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mikka wants to order a pizza with two different toppings. He has 8 different toppings to choose from. How many different pizzas could he order?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
28
Mikka wants to order a pizza with two different toppings. He has 8 different toppings to choose from. How many different pizzas could he order?
test