假设某人定了鲜奶,送奶工可能在早上6:30~7:30之间把鲜奶送到他家,他离开家去上学的时间是6:15~7:00之间,设送奶工到达他家的时间是x,他离开家的时间是y.用数对(x,y)表示可能的试验结果,则全部事件组成的集合Ω=(x,y)|6.5≤x≤7.5,6.25≤y≤7.
(1)用集合表示他能在离家前喝到鲜奶的事件A;
(2)他能在离家前喝到鲜奶的概率是多少?
考点分析:
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