7 black shirts 5 white shirts 10 gray shirts one is chosen at random, what is the probability that i

7 black shirts 5 white shirts 10 gray shirts one is chosen at random, what is the probability that it is not gray

Find the total shirts:
Total shirts = Black Shirts + White Shirts + Gray Shirts
Total shirts = 7 + 5 + 10
Total shirts = 22

Calculate the probability of choosing a gray shirt:
P(Gray) = Number of Gray shirts / Total Shirts
P(Gray) = 10/22

We can simplify this fraction. We type in 10/22 into our search engine, choose simplify, and we get:
P(Gray) = 5/11