A box is filled with 5 blue cards,2 red cards, and 5 yellow cards. A card is chosen at random from t

A box is filled with 5 blue cards,2 red cards, and 5 yellow cards. A card is chosen at random from the box. What is the probability that it is a blue or a yellow card? Write your answer as a fraction in simplest form.

We want P(B) + P(Y)
P(B) = 5/12
P(Y) = 5/12

P(B) + P(Y) = 5/12 + 5/12 = 10/12

Reduce this fraction using 2 as our common factor:
5/6