Question

In a certain Algebra 2 class of 30 students, 7 of them play basketball and 15 of them play baseball. There are 10 students who play neither sport. What is the probability that a student chosen randomly from the class plays basketball or baseball?

Answer 1

$$P(baseball\ or\ basketball)=\dfrac{30-10}{30}=\dfrac{2}{3}$$

The probability that a student chosen randomly from the class plays basketball or baseball is 2/3.