Предмет: Алгебра, автор: Sahaaaa

Теория вероятности. Набор для игры в домино 28 костей.Берут 2 шт, они оказываются дублеем.Найти вероятность события:а) 3-я кость оказалась дублем, б) 3-я кость оказалась не дублем

Ответы

Автор ответа: Bokova

0

а) т.к. одна дубль то вероятность равна 6/27, так как только 6 костей домино из оставшихся 27 могут пристыковаться к ней
Р(А) = 6/27 = 2/9

б) Если не дубль, то вероятность в 2 раза выше т.е 12/27
Р(А) = 12/27 = 4/9

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