Решение задачи N4491 теория вероятностей
4491. There are 6 white and 9 black balls in the urn. 2 balls are taken out of the urn at the same time. 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.