How many ways can Patricia choose 2

Question

pizza toppings from a menu of 9
toppings if each topping can only be chosen once?

Answer 1

To calculate the number of ways Patricia can choose 2 pizza toppings from a menu of 9 toppings, we can use the combination formula.

The formula for combination is: nCr = n! / (r!(n-r)!)

In this case, n = 9 (number of total toppings) and r = 2 (number of toppings to choose).

So, the number of ways Patricia can choose 2 pizza toppings from a menu of 9 toppings is:

9C2 = 9! / (2!(9-2)!) = 36

Therefore, Patricia can choose 2 pizza toppings from a menu of 9 toppings in 36 different ways.