Ajay and his wife Reshmi appear in an interview for two vaccancies in the same post. The Probability of Ajay's selection is 1/7 and that of his wife Reshmi's selection is 1/5. What is the probability that only one of them will be selected?
Answer: C) 2/7
P( only one of them will be selected) = p[(E and not F) or (F and not E)]