两人相约在7:30到8:00之间相遇,早到者应等迟到者10分钟方可离去,

两人相约在7:30到8:00之间相遇,早到者应等迟到者10分钟方可离去,如果两人出发是各自独立的,在7:30到8:00之间的任何时刻是等可能的,问两人相遇的可能性有多大  

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