Решение задачи N4385 теория вероятностей
4385. From the basket, which contains 15 white and 5 black balls, take out 2 balls at random. What is the probability that both balls will turn out to be black?
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
Оплата и выдача товара осуществляются через партнёрскую платформу.