Решение задачи N2580 теория вероятностей
2580. From an urn in which there are 12 white and 8 black balls two balls are taken out. What is the probability that both balls will be black?
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
Оплата и выдача товара осуществляются через партнёрскую платформу.