Answer:
C 10 pizzas
Step-by-step explanation:
We know that there are 40 total pizzas
We also know the percentage of each pizza, except mushroom.
By definition, the total percent of everything is 100%
If we add up what we know...we get the following:
10% Pineapple + 45% Pepperoni + 20% Ham equals 75%
10 + 45 = 55
55 + 20 = 75
If all the pizzas other than Mushroom equals 75% of the pizza toppings, then Mushroom must be 25% of the pizzas
100% - 75% = 25%
25% of 40 pizzas is 0.25 x 40 which equals 10
25% is also the same as 1/4 or one quarter...so 40 divided by 4 is also 10.
So the answer is C. 10 pizzas
Another was to approach this would be to figure out how many of each other pizzas there are.
10% Pineapple is 0.10 x 40 = 4 Pineapple pizzas
45% Pepperoni is 0.45 x 40 = 18 Pepperoni pizzas
20% Ham is 0.20 x 40 = 8 Ham pizzas
if you add 4 + 18 + 8 you get 30 pizzas
40 total pizzas minus 30 non mushroom pizzas leaves 10 mushroom pizzas
