Suppose S and T are mutually exclusive events. Find P(S or T) if P(S) = 8/9 and P(T) =1/10?

Question

4/45
89/19
89/90
9/19

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Answer 1 · 2017-04-13T23:08:43

P(S or T) will be P(S) + P(T) because they are mutually exclusive.
Hence#P(S orT)=P(S)+P(T)= 8/9 + 1/10 = 80/90 + 9/90 = 89/90#.