Решение задачи N3508 теория вероятностей Бернулли

3508. From the wallet on the table poured 7 coins. a) What is the probability that 5 of them have fallen up? b) What is the probability that at least 5 of them have fallen up? c) What is the most likely number of coins that have fallen up?

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