本着健康、低碳的生活理念，租自行车骑游的人越来越多，某自行车租车点的收费标准是每车每次租车不超过两小时免费，超过两小时的部分每小时收费标准为2元(不足1小时的部分按1小时计算)，有甲、乙人互相独立来该租车点租车骑游(各租一车一次)，设甲、乙不超过两小时还车的概率分别为
两小时以上且不超过三小时还车的概率分别为
两人租车时间都不会超过四小时。
分别求出甲、乙在三小时以上且不超过四小时还车的概率；
参考答案：
分别记甲、乙在三小时以上且不超过四小时还车为事件A、B，则
答：甲、乙在三小时以上且不超过四小时还车的概率分别为
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| Peace of mind basically means having no stress (压力) or anxiety. It's a state where you know everything is going to be okay. You don't have any 1 or concerns.This is a great thing to experience. 2 , the way of life makes it hard to ever experience this state of mind. Most people go through the opposite where they constantly have stress and 3 of not being able to meet certain expectations (期望) or anxiety over the daily demands of life. Meditation (冥想) can help you 4 peace of mind because it will allow you to 5 and let go of all of the things that are causing you stress and worry. It can be a great way to be at peace with yourself. What you can do is simply sit quietly and just focus on breathing for about 30 minutes. Make sure there are no distractions. If you want, you can play some peaceful music to help 6 a more relaxing environment. The reason for doing this is to train your 7 to be able to feel like it's at peace regardless of what sort of demands of life you have to deal with. The more you do it, the easier getting to this state will be. Having peace of mind comes down to being able to 8 what needs to hold on and let go what should be let go. Let go of things you can't change. Do what you need to do to 9 the situation when there are things you can do to make a change. Once you do all you can do, just let it be.Peace of mind comes when you just let things be and 10 stressing over things that is out of your control. | ||||
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