题目

One small thing changes Sonia. She always thinks of the boy, but why doesn’t she help him? The boy wants to buy a book, but he can’t, ______ he has no money. He is very upset(沮丧的). He looks at the money in Sonia’s hand. He can buy the ______ with it. But Sonia walks away. Sonia doesn’t ______ his idea. Then she comes back home. She tells it ______ her brother David. David says, “Why not give him money? He needs ______ , and you can help him.” Sonia ______ to that shop to find that boy, but time never waits(等待) for someone.On that day, Sonia ______ a lesson. Many people ar某高校从参加今年自主招生考试的学生中随机抽取容量为50的学生成绩样本，得频率分布表如下：组号分组频数频率第一组[230，235）80.16第二组[235，240）①0.24第三组[240，245）15②第四组[245，250）100.20第五组[250，255]50.10合              计501.00（1）写出表中①②位置的数据；（2）为了选拔出更优秀的学生，高校决定在第三、四、五组中用分层抽样法抽取6名学生进行第二轮考核，分别求第三、四、五各组参加考核人数；（3）在（2）的前提下，高校决定在这6名学生中录取2名学生，求2人中至少有1名是第四组的概率．