Предмет: Алгебра, автор: Nastena199627

В колледже 3% мальчиков и 2% девочек выше 1,60 м. К тому же известно, что 60% учеников составляют девочки. Выбирают одного ученика наудачу и его рост оказывается выше 1,60 м, какова вероятность того, что этот ученик – девочка?

Ответы

Автор ответа: goblipc2003

Пусть в школе 100 учеников

60 девочки и 40 мальчики

1,2 девочок и 1,2 мальчика в школе выше 1,60м

Значит ответ 50%

goblipc2003: Знаю, странно но ответ имено такой

Nastena199627: 1,2 это 1 целая 2 дестых?

mrhaker792776: Да

Nastena199627: А как получилось?

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