[PPSC SCIENTIFIC ASSISTANT (POLYGRAPH)]

19. 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?

1. 4/5

2. 2/7

3. 8/15

4. 4/7

Correct Answer :

2/7