The members of a wine tasting club are married couples .For any married couple in the club , the probability that the husband is retired is 0.7 and the probability that the wife is retired is 0.4 .Given that the wife is retired , the probability that the husband is retired is 0.8 .
For a randomly chosen married couple who are members of the club , find the probability that
a) both of them are retired ,
b) only one of them is retired ,
c) neither of them is retired
Two married couples are chosen at random .
d)Find the probability that only one of the two husbands and only one of the two wives is retired
My turn : a) $0.4 \times 0.8 = 0.32$
b) Using Venn-diagram i got the probability would be $0.08 + 0.38 = 0.46$
c) Also using the same Venn-diagram i got $0.22$
d)I do not understand this part ?