Question 1187896
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Events A, B and C cover the entire space of events and are DISJOINT (= mutually exclusive).


                       THEREFORE


(a)  P(C) = 1 - P(A) - P(B) = 1 - 0.990 - 0.001 = 0.009.


(b)  P    = P(B') = 1 - P(B) = 1 - 0.001 = 0.999.


(c)  P    = 1 - P(A) = 1 - 0.990 = 0.01.
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Solved.