Решение задачи N4597 теория вероятностей

4597. There are 10 balls in the urn. Of these, 3 are blue, 5 are red, the rest are yellow. Take out 1 ball at random. What is the probability that the removed ball will turn out to be red.

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