Question

What is wrong with the expression P(A) + P(A) = 0.5?

Answer 1

Answer:

If you have two P(A) or two P(B) then the probability would not be 50% {0.5} it would be 100% {0.10} because it would be the same.

Step-by-step explanation:

The probability that Events A and B both occur is the probability of the intersection of A and B.  The probability of the intersection of Events A and B is denoted by P(A ∩ B). If Events A and B are mutually exclusive, P(A ∩ B).

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If you buy a matching red shirt and and a matching set of red pants it wouldn't be 50% of the outfit unless you wore the shirt with blue pants or wore the pants with a blue shirt.