Предмет: Математика, автор: king0070

в ящике 5 черных и 6 белых шаров случайным образом вынимается 4 шара что среди них имеетс 2 белых шара

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Автор ответа: timurka5

Всего 10 шаров. Вероятность а)=4/10=0,4 2)=6/10/4=0,15 (т.е. вероятность вынимания чёрного шарика мы делим на 4 т.к. должно повести 4 раза, вероятность не может быть больше 1)

Автор ответа: king0070

всего 11 шаров, а не 10 т.к 5 черных и 6 белых

Автор ответа: king0070

и нужно найти вероятность того что среди них имеется точно 2 белых шара

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