Предмет: Математика, автор: ParnishAkademik

среди 30 ампул, проверенных на герметичность, оказалось 6 ампул с трещинами. найдите вероятность того, что среди 20 выбранных ампул все будут без трещин.

Ответы

Автор ответа: olychka4002
0
Типичная задача на вероятность.Используем стандартную формулы нахождения вероятности-число благоприятных исходов:число всех исходов.
30-6=24 ампулы-без трещин
20:24=0,83 или 0,8
Ответ:0,8
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