Suppose the children in a school are classified in two ways, boys/girls and fair-haired/dark-haired. The following information is available:?

Two-thirds of the children are boys of whom half are faired-haired. One-third of the children are girls of whom three-quarters are fair-haired. What is the probability that a fair-haired child is a boy? Pls explain with workings. Thxs