At a pizza shop, 75% of the customers order pizza, 20% of the customers order salad, and 15% of the customers order a pizza and a salad. if a costumer isn’t chosen at random, what is the probability that he or she orders either a pizza or salad?

The probability that he or she orders either a pizza or salad is 80%.

Step-by-step explanation:

Given : At a pizza shop, 75% of the customers order pizza, 20% of the customers order salad, and 15% of the customers order a pizza and a salad. If a costumer isn’t chosen at random.

To find : What is the probability that he or she orders either a pizza or salad?

Solution :      

Let A be the event that customer order Pizza

Let B be the event that customer order Salad

75% of the customers order pizza,

P(A)=75%=0.75

20% of the customers order salad,

P(B)=20%=0.20

15% of the customers order a pizza and a salad,

Now, The probability that he or she orders either a pizza or salad

Therefore, The probability that he or she orders either a pizza or salad is 80%.

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.