Mathematics
Mathematics, 16.06.2021 14:00, nhester3401

Lấy ngẫu nhiên lần lượt từng sản phẩm từ một lô hàng có 15 sản phẩm loại 1 và 5 sản phẩm loại 2, cho đến khi được 3 sản phẩm loại 1 thì dừng. Tính xác suất dừng ở lần lấy thứ tư.

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Lấy ngẫu nhiên lần lượt từng sản phẩm từ một lô hàng có 15 sản phẩm loại 1 và 5 sản phẩm loại 2, ch...

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