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Question :- If A and B are two mutually exclusive events the probability of occurring A or probability occurring B is P(A) + P(B).
P(A or B) = P(A) + P(B)

What is the probability of a die showing 5 or 3 when it is rolled down?
 Jul 25, 2013
 #1
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Assuming the dice has 6 faces & each face has equal probability of showing up (i.e. all the sides are even),
P (5 showing up) = 1/6
P (3 showing up) = 1/6

Adding them, gives 2/6 or 1/3.
 Jul 25, 2013

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