Решение задачи N3634 теория вероятностей Байеса

3634. In some university 70% of boys and 30% of girls. Among boys, 40% are smokers, and among girls, 20%. At random, the chosen person turned out to be a smoker. What is the probability that this is a young man.

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)