Probability 3 Question 23
23. Let and be two independent events. The probability that exactly one of them occurs is and the probability of none of them occurring is . If denotes the probability of occurrence of the event , then
(2011)
(a)
(b)
(c)
(d)
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Solution:
[i.e. only
Neither of them occurs
From Eq. (i),
From Eq. (ii),
From Eqs. (iii) and (iv),