Предмет: Математика, автор: ML1996

задания 2
На один ряд, состоящий из 4+19 мест, случайно садятся 4+19 учеников, Найти вероятность того, что 3 определенных ученика окажутся рядом

задача 3
На урны, содержащей 10+19 белых и 40+19 серных шаров, вынимаются два шара.
а) Найти вероятность того, что шары разных цветов.
б) Найти вероятность того, что шары одного цвета.

Ответы

Автор ответа: pirogov3

А ВЕРОЯТНОСТЬ ТОГО ЧТО ОДНОГО ЦВЕТА 0,5

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