7B - Probability

In a golf tournament,

Let event A be the probability that Tiger Woods win. P(A) = 0.3
Let event B be the probability that Ernie Els win. P(B) = 0.2
Let event C be the probability that Vijay Singh win. P(C) = 0.1

Therefore, P(A U B U C) = P(A) + P(B) + P(C)