Question

At snack time, Kim can choose between two different types of milk and three different types of cookies. She made this tree diagram of the possible combinations for her snack.



image.png



If the probability of each snack is the same, what is the probability that her snack is plain milk and sugar cookies?


1
8


1
6


1
3


1
2

Answer 1

There are 2 choices of milk × 3 choices of cookies = 6 equally likely snack combinations. Only 1 of those is plain milk with sugar cookies, so the probability is 1/6.