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Mathematics, 03.08.2021 09:00 anrs14

Bệnh B được điều trị bằng hai phương pháp. Xác suất điều trị khỏi bệnh bằng phương pháp I, II lần lượt là 0,8 và 0,9. Số người điều trị bằng phương pháp II gấp 3 lần số người điều trị bằng phương pháp I. Chọn ngẫu nhiên một người đang điều trị bệnh B. Tính xác suất người đó điều trị không khỏi bệnh? A. 0,875
B. 0,37
C. 0,73
D. 0,125

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Bệnh B được điều trị bằng hai phương pháp. Xác suất điều trị khỏi bệnh bằng phương pháp I, II lần lư...
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