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Molodets [167]
3 years ago
15

10 пожалуйста решите

Mathematics
1 answer:
aivan3 [116]3 years ago
8 0

Answer:    1/22

Step-by-step explanation:

Вероятность вытащить оба белых шара есть умножение вероятностей 2-х событий:

Р(белый,белый)=Р(первым выберут белый шар)*Р(вторым выберут белый шар)

Р(первым выберут белый шар)=3/12=1/4

Но после того как выбрали белый шар , остались только 2 белых шара и всего осталось 11 шаров.  Поэтому

Р(вторым выберут белый шар)= 2/11

Р(белый,белый)=1/4*2/11=2/44=1/22

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