Mary made a trial mix that consists of 30 peanuts, 40 raisins, 10 chocolate candies, and 20 banana chips. She picks one

[Gmat_mission]

Mary made a trial mix that consists of 30 peanuts, 40 raisins, 10 chocolate candies, and 20 banana chips. She picks one item from the bag at random. What is the probability that she picks either a chocolate candy or a banana chip?

a. 1/50

b. 1/10

c. 1/5

d. 3/10

e. 7/10

Answer: D

Source: Princeton Review

[Scott@TargetTestPrep]

Mary made a trial mix that consists of 30 peanuts, 40 raisins, 10 chocolate candies, and 20 banana chips. She picks one item from the bag at random. What is the probability that she picks either a chocolate candy or a banana chip?

a. 1/50

b. 1/10

c. 1/5

d. 3/10

e. 7/10

Answer: D

Solution:

There are 100 items in the bag, including 10 chocolate candies and 20 banana chips. We add the probabilities of the individual items to obtain the probability of picking either a chocolate candy (C) or a banana chip (B).

P(C or B) = 10/100 + 20/100 = 30/100 = 3/10

Answer: D