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Example 3.15 from Statistics, 3.3 Two Basic Rules of Probability
b. What is the probability that Carlos makes either the first goal or the second goal?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
b. The problem is asking you to find P(A OR B).
P(A OR B) = P(A) + P(B) − P(A AND B) = .65 + .65 − .585 = .715
Carlos makes either the first goal or the second goal with probability .715.
How did it go?