Arin has to visit at random three of his friends A, B and C over a week-end. What is the probability that he visits:
(a) B before C (b) B before C and C before A
(c) C first (d) A just before B
(e) A either first or last?
A, B, C are three mutually exclusive and exhaustive events of a random experiment. Find the values of P(A), P(B) and P(C), given that
If A and B are two mutually exclusive events, then prove that P(A ∪ B) = P(A) + P(B)
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