pls help! will give brainlist!

artie has a book of short stories. the number of each type of short story is shown below. he selects one short story at random. what is the probability that the story artie selects is either a science-fiction story or an adventure story?

a. 1/3
b. 2/1
c. 2/3
d. 1/2

pls help will give brainlist artie has a book of short stories the number of each type of short story is shown below he selects one short story at random what i class=