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grace7484
14.06.2021 •
Mathematics
Một nhà máy có 3 phân xưởng, tỉ lệ là 20%, 30%, 50%. tỉ lệ sản phẩm loại một của các phân xưởng lần lượt là 90%, 85%, 80% lấy ngẫu nhiên 1 sản phẩm của nhà máy, tính xác suất để được sản phẩm loại một
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Ответ:
83.5%
Step-by-step explanation:
90% × 20% + 85% × 30% + 80%× 50%
Ответ: