Suppose S and T are mutually exclusive events. Find P (S or T) if P (S) = 29% and P (T) = 49%.

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Bria Shea

Mathematics

19 July, 09:22

Suppose S and T are mutually exclusive events. Find P (S or T) if P (S) = 29% and P (T) = 49%.

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Sassy · Answer 1

Mutually exclusive means that the intersection of the events is empty: P (S and T) = 0.

P (S or T) = P (S) + P (T) = 29% + 49% = 78%

If events S, T are not mutually exclusive, then P (S or T) = P (S) + P (T) - P (S and T)