How many ways can Patricia choose 4 pizza toppings from a menu of 5 toppings if each topping can only be chosen once?
The number of ways Patricia can choose 4 pizza toppings from a menu of 5 toppings can be calculated using the combination formula:
nCr = n! / r!(n-r)!
where n is the total number of toppings and r is the number of toppings to be chosen.
In this case, n = 5 and r = 4:
5C4 = 5! / 4!(5-4)!
5C4 = 5! / 4!1!
5C4 = (5*4*3*2*1) / (4*3*2*1*1)
5C4 = 5
Therefore, Patricia can choose 4 pizza toppings from a menu of 5 toppings in 5 different ways.