A cookie jar has 3 chocolate chips, 2 peanut butter, and 5 oatmeal raisin cookies. If Mo chooses a cookie, does not replace it, then chooses another, what is the probability that he chooses a peanut butter then a chocolate chip cookie?

1:5, 1:3

Step-by-step explanation:

a cookie jar has 10 total cookies

peanut butter: the probability that he chooses a peanut butter is 2:10 or 1:5

now the cookie jar only has 9 because he took one and didn't replace it

chocolate chip cookie: the probability that he chooses a chocolate chip cookie is 3:9 or 1:3

2 peanut butter / 10 total cookies x 3 chocolate chip / 9 total cookies = 6/90 = 1/15

1/15 chance