A man and his wife appear in an interview for two vacancies in the same post. The probability of husbands' 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?
A : 4/5
B : 2/7
C : 8/15
D : 4/7

• p(a)=1/7;p(not a)=6/7
  P(b)=1/5;p(not b)=4/5
  P(a not b)+p(b not a)=1/7*4/5+1/5*6/7 will gives ans
• 10 years agoHelpfull: Yes(2) No(0)