Let px 055 and py 30 assume the probability that they both

Let p(x) = 0.55 and p(y) =.30 assume the probability that they both occur is 0.15 what is the probability of either x or y occurring?

Please show me how you get the answer

Solution

Note that

P(x or y) = p(x) + P(y) - P(x and y)

Thus,

P(x or y) = 0.55 + 0.30 - 0.15

= 0.70 [ANSWER]