Задание по теории вероятности. Из группы в 15 человек должны быть выделены бригадир и 4 члена бригады. Сколькими способами это можно сделать? Заранее спасибо.

Задание по теории вероятности.
Из группы в 15 человек должны быть выделены бригадир и 4 члена бригады. Сколькими способами это можно сделать?
Заранее спасибо.
- Предмет:
  Математика
- Автор:
  maryqeud
- 6 лет назад

Ответы 1

Сначала выбираем бригадира 15 способами.Из оставшихся 14 человек выбираем 4 членов бригады $C^4_{14}= \dfrac{14!}{4!10!} =\dfrac{11*12*13*14}{2*3*4}=1001$ способами.На каждый способ выбора бригадира приходится 1001 способ выбора членов бригады. Всего способов 15*1001=15015.
- Автор:
  heatherflynn
- 6 лет назад
- 0
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Задание по теории вероятности. Из группы в 15 человек должны быть выделены бригадир и 4 члена бригады. Сколькими способами это можно сделать? Заранее спасибо.

Ответы 1

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Задание по теории вероятности.
Из группы в 15 человек должны быть выделены бригадир и 4 члена бригады. Сколькими способами это можно сделать?
Заранее спасибо.