Предмет: Математика, автор: katerynaiv

В магазин поступило 15 компьютеров, среди которых 3 имеют скрытые дефекты. Найти вероятность того, что выбранный наудачно компьютер, не имеет скрытых дефектов.

Ответы

Автор ответа: ksyuwi
3

Сначала нужно посчитать количество компьютеров без скрытых дефектов.

15 - 3 = 12

Теперь найдём вероятность с помощью формулы:

Формула вероятности  ⇒  P=\frac{m}{n}   , где m – число исходов, способствующих исполнению какого-либо события , а n – число всех равновозможных исходов.

m = 12 ;  n = 15

P=\frac{m}{n}=\frac{12}{15}= \frac{4}{5}=  0,8

Ответ:   вероятность того, что выбранный наудачно компьютер окажется без скрытых дефектов равна 0,8

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Any politician who wants to win should be a real
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