A man and his wife appear in an interview for two vacancies in the same post. The probability of husband’s selection is (1/7) and the probability of wife’s selection is (1/5). What is the probability that only one of them is selected? Choose the correct choice from the following options:
A) 1/7
B) 4/7
C) 5/7
D) 2/7
E) 9/7
P(A)=1/7   P(B)=1/5   P(A’)=6/7   P(B’)4/5   Required probability= P((A and B’) or ( B and A’))   =(1/7x4/5)+(1/5x6/7)   =2/7   ANSWER 2/7
<result>D</result>
A man and his wife appear in an interview for two vacancies in the same post. The probability of husband’s selection is (1/7) and the probability of wife’s selection is (1/5). What is the probability that only one of them is selected?