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Mathematics, 14.06.2021 14:00 bitterswt01

Một người đi từ nhà đến cơ quan phải trải qua 3 ngã tư, xác xuát đẻ người đó gặp đèn đỏ ở các ngã tư tương ứng 0,2;0,4;0,6. Hỏi thời gian trung bình phải ngừng trên đường là bao nhiêu, biết rằng khi gặp đèn đỏ ,người ấy phải đơi khoảng 3 phút

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Một người đi từ nhà đến cơ quan phải trải qua 3 ngã tư, xác xuát đẻ người đó gặp đèn đỏ ở các ngã tư...
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