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Список к экзамену состоит из 20 вопросов. Студент не выучил 2. Чему равна вероятность того, что ему попадётся выученный вопрос?

Ask by Turnbull Franklin. in Russia
Feb 26,2025

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Вероятность того, что студенту выпадет выученный вопрос, равна 90%.

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Всего вопросов 20, а студент выучил 20 - 2 = 18 вопросов. Вероятность того, что выпадет выученный вопрос, равна отношению числа выученных вопросов к общему числу вопросов:   вероятность = 18 / 20 = 9 / 10 = 0.9 То есть вероятность равна 90%.

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Чтобы найти вероятность того, что студенту попадётся выученный вопрос, нужно учесть общее количество вопросов и количество тех, которые он выучил. В данном случае у студента 20 вопросов, из которых 18 — выученные (20 - 2 = 18). Вероятность того, что вопрос будет выученным, равна отношению количества выученных вопросов к общему количеству вопросов: 18/20, что сокращается до 9/10 или 0.9. Таким образом, вероятность равна 0.9 или 90%. На заметку: в математике нередко используют аналогичные задачи для иллюстрации теории вероятностей, и важно не путать с другими концепциями, такими как комбинаторика или статистика. Развивайте свои навыки, решая задачи разного типа!

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