Final answer:
The probability of picking a pepperoni pizza is 1/3.
Step-by-step explanation:
To find the probability of picking a pepperoni pizza, we need to calculate the ratio of the number of pepperoni pizzas to the total number of pizzas.
Total number of pizzas = 8 pepperoni + 4 cheese + 12 sausage = 24 pizzas.
Number of pepperoni pizzas = 8 pizzas.
Probability of picking a pepperoni pizza = Number of pepperoni pizzas / Total number of pizzas = 8 / 24 = 1/3.