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Помогите плиз:* №1. На балу присутствуют 30 кавалеров и 25 дам.Сколько существует способов составить пару для танца? №2. В отряде 25 бойцов.Двоих надо отправить в разведку.Сколько существует вариантов это сделать?
Ответы 1
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1) Одного кавалера можно выбрать 30 способами, а одну даму - 25 способами. По правилу произведения, составить пару для танца можно 30*25 = 750 способами.
2) Порядок выбора бойцов не имеет значения, значит отправить двоих на разведку можно
способами.
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Автор:
chaimmoses - 5 лет назад
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