Question

In species which are partial migrants, only a fraction of the population migrates from the breeding areas, and the remainder remain there. In some species, it is mostly males that are migrants. In the species we are studying, 85% of the males are migrants and 50% of the females are migrants. In addition we are told that the sex-ratio is skew, so that 40% of the population are males.
(a) What is the probability that a bird which has migrated is a female using a contingency table?
(b) What is the probability that a bird which has not migrated is a female?

Answer 1