考点：等可能事件的概率,频率分布直方图
专题：概率与统计
分析：（1）根据表格和条形统计图可得空气质量类别为中度污染的天数，然后利用古典概型的概率公式可求出所求；（2）由条形图知，空气质量类别颜色为紫色的数据有4个，分别设为a、b、c、d，空气质量类别颜色为褐红色的数据有2个，分别设为e、f，然后列举出基本事件，以及至少有一个数据反映的空气质量类别颜色为褐红色的事件，最后根据古典概型的概率公式解之即可．
解：（1）由条形统计图可知，空气质量类别为中度污染的天数为6，所以该城市本月内空气质量类别为中度污染的概率&P=630=15．（2）由条形图知，空气质量类别颜色为紫色的数据有4个，分别设为a、b、c、d，空气质量类别颜色为褐红色的数据有2个，分别设为e、f．设从以上6个数据任取2个，至少有一个数据反映的空气质量类别颜色为褐红色为事件A，则基本事件有：（a，b），（a，c），（a，d），（b，c），（b，d），（c，d），（a，e），（a，f），（b，e），（b，f），（c，e），（c，f），（d，e），（d，f），（e，f）共15种可能，A包含的基本事件有：（a，e），（a，f），（b，e），（b，f），（c，e），（c，f），（d，e），（d，f），（e，f）9种可能，故所求的概率P(A)=915=35．
点评：本题主要考查条形图，以及古典概型的概率计算，常用利用列举法进行求解，同时考查学生的阅读能力和分析问题的能力，属于基础题．
请在这里输入关键词：
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300万买学区房还是上国际学校 哪个划算？(1)
发布时间： 11:25:55
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发布人：Tank
天价学区房，用500万换来一个重点小学的入学名额，而明星们却用20多万一年的学费为儿女做教育投资。学区房还是国际学校，在经济上看哪个更划算？
　　月初，46万/平米的天价学区房引爆了2016年买房择校的高潮，用500万换来一个重点小学的入学名额，&老破小&的学区房成为家长心中公认的投资优质教育的&捷径&。
　　他们说，孟母还要三迁，学区房不是买不买，而是什么时候买的问题。而另一方面，现在社会名流、演艺明星却让孩子弃传统的公立名校选择贵族国际学校，比如当年王菲女儿窦靖童，只在北京四中读书一年就转去上海就读德威国际学校。他们用20多万一年的学费 为儿女做教育投资。学区房还是国际学校，在经济上看，哪个更划算? 51offer小编下面为家长们做一个对比分析。
　　中档公立教育VS中档国际学校
　　公立学校
数据来源：某房地产中介，择校费来自某文库
　　中档基础教育的目的就是&用钱给孩子一个良好的教育&，这里的学区房一般是10-20万元/平米，但都是胡同里面 &老破小&的一间，甚至已经不能居住。只要户口在片区，部分区立的重点小学可以通过&择校费&来解决。不过虽然政府要求学校择校费最多不可以超过3万，但 是加上中间费、占坑班、奥数班等明目繁多的费用，即使是区重点小学，择校费最高也可能超过8万元。
　　国际学校
　　中档国际学校一般是西式教育体系适度本土化，对户籍不再有要求，中国大陆学生的比例也一般在8成以上。但是国际学校因为没有传统的学籍、户籍要求，是没有本地户籍学生的福音。
数据来源：某学校官网