globalremix
02.08.2021 •
Mathematics
Học phần Toán chuyên đề 1 có 3 lớp học phần, mỗi lớp học phần có 30 sinh viên. Trong
đó,lớp học phần thứ 1 có 20 sinh viên nam; lớp học phần thứ 2 có 25 sinh viên nam và
lớp học phần thứ 3 có 15 sinh viên nam.
1) Lấy ngẫu nhiên từ mỗi lớp một sinh viên. Tính xác suất để chọn được 2 sinh
viên nữ.
2) Lấy ngẫu nhiên một lớp. Tính xác suất để lấy được sinh viên nữ từ lớp học phần
đó.
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Ответ:
Step-by-step explanation:
There must be an attachment. I have no knowledge of what to solve for, unless you can tell or show me the missing pieces.