probability question
Imagine 5 events, a, b, c, d and e. They may be mutually exclusive, or they may not be. All you know about them is the following:
P(a U c) = .4
P(a U b U d U e) = .8
P(c U d) = .4
P(a U b U c U d U e) = 1
What is P(a)? Is there a unique solution?
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