Предмет: Алгебра, автор: уточкаааа

В финал конкурса вышли 5 участников. Сколькими способами могут распределиться два первых места

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Автор ответа: Rechnung

На первое место могут претендовать любые из пяти участников, а на второе место - любые из оставшихся четырёх, поэтому
5(5-1)=5*4=20(способов)-всего

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1. My sister (to get) up at eight o'clock. 2. She (to be) a school-girl. She
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1. There isn’t a cloud in the sky, but it (be) cloudy in the morning. 2. Mrs.
Clay usually finishes her work at half past three, but she (finish) it later yesterday afternoon. 3. Tom is playing tennis tomorrow afternoon, he (not / play) tennis yesterday. 4. We generally have lunch at 12.30, but yesterday we (have
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92
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