小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红家人在下午6:30~7:00之间的任何一个时间随机小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红一家人在下午6:30~7:00之间

小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红家人在下午6:30~7:00之间的任何一个时间随机小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红一家人在下午6:30~7:00之间
小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红家人在下午6:30~7:00之间的任何一个时间随机
小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红一家人在下午6:30~7:00之间的任何一个时间随机地开始晚餐.求晚报在晚餐开始 之前被送到和在晚餐开始之后被送到的概率各是多少?

小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红家人在下午6:30~7:00之间的任何一个时间随机小红家晚报在5:30~6:30之前的任何一个时间随机地被送到 ,小红一家人在下午6:30~7:00之间
（1）晚报在晚餐开始之前被送到比在晚餐开始之后被送到的可能性大.
（2）晚报在晚餐开始之前被送到的概率是87.5%.
解析:
运用几何概型.如图,方形区域内任何一点的横坐标表示送报人到达的时间,纵坐标表示小明一家开饭时间,假设随机试验落在方形内任何一点是等可能的,所以符合几何概型的条件.所以晚报在晚餐开始之前被送到的概率是602- =87.5%,晚报在晚餐开始之后被送到的概率是22.5%.

Air Jordan sneakers have been the top selling signature basketball shoe that Nike has ever produced, and has an instant hit thanks to a high flying rookie as well as one of the best marketing campaign...

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Welcome to buy the latest Nike Air Max Ltd sneakers from us. The Nike Air Max Ltd rolles up the simple and sleek classic design into one. The design of the wrapparound Air-sole unit is taken from the ...

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