Question

A restaurant has 4 pizza toppings to choose from. How many different 2-topping pizzas are possible

Answer 1

6

Explanation:

Choose 1 of 4 for the first topping.

Then choose 1 of the remaining 3 for the second topping.

4 × 3 = 12

Since it is the same to have toppings A and B as it is to have toppings B and A, divide the result above by 2.

112/2 = 6

Answer: 6