Mathematics, 21.06.2021 14:00, javink18

Trong một thùng kín có hai loại thuốc A, B. Số lượng thuốc A bằng 2/3 số lượng thuốc B. Tỉ lệ thuốc A, B đã hết hạn sử dụng lần lượt là 20%; 25%. Chọn ngẫu hiên một lọ từ thùng và được lọ thuốc đã hết hạn sử dụng. Tính xác suất lọ này là thuốc A

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Trong một thùng kín có hai loại thuốc A, B. Số lượng thuốc A bằng 2/3 số lượng thuốc B. Tỉ lệ thuốc...