Question

https://cdn.app.edmentum.com/EdAssets/a740a885627c428499599513c07278ab?ts=635387484165830000

Select the correct answer.
A cake shop bakes a variety of brownies. The top-selling brownies are ones with toppings of chocolate chip, walnuts, or both. A customer enters the store. The probability that the customer will pick both toppings is 0.4. What is the probability that they will pick neither the chocolate chip nor the walnut toppings?



A.
0.5
B.
0.3
C.
0.45
D.
0.8
E.
0.2

Answer 1

there are only four possibilities:

- no toppings
- only chocolate chip
- only walnuts
- both chocolate chips + walnuts

since these are all the possibilities, they must add up to 1

to find the probability of no toppings, simply subtract 1 - (the other probabilities)