今天启德考培小编给大家带来是由凌丽雯老师带来的——GRE数学题讲解，一起来学习下。

　　凌丽雯老师

　　授课科目：托福听力、托福预备词汇、托福预备语法、雅思听力、GRE数学、GMAT数学、ACT数学、SAT数学

　　托福组预备段教研组负责人，北美学术理科组负责人，启徳集团明星教师，六年教学经验，授课小时10000+

　　注重因材施教，深挖不同学生的具体问题，有针对性提出解决方案。结合课堂上的结构分析法来帮助学生梳理托福听力关键出题点，听出技巧，关注学生听力理解能力培养和语言逻辑能力的提升。曾帮助学生在短期内将听力成绩从16分提升到26分。

　　参与编写启德集团内部教材《2019年托福学术研究报告》《2018年托福学术研究报告》《2017年托福年度报告》《2016年托福年度报告》《托福听力28天》《托福听力预备段教程》《托福听力强化段教程》等

　　题目1

　　A weighted coin has a probability p of showing heads. If successive flips are independent, and the probability of getting at least one head in two flips is greater than 0.5, then what could p be? Indicate all possible values.

　　A.0.1

　　B.0.2

　　C.0.3

　　D.0.4

　　E.0.6

　　F.0.7

　　题目2

　　In basketball, when Monica takes her first free throw, she has a 50% chance of scoring. If she takes an additional throw, she has a 75% chance of scoring on this throw if she scored on the immediately previous throw, but only a 25% chance of scoring on this throw if she didn't score on the immediately previous throw. Suppose she has to take a set of three free throws in a row, and she doesn't score on the first one. What is the probability that she scores at least once on one of the subsequent two throws?

　　知识点

　　对立事件概率和为1

　　事件A和事件B是对立事件

　　那么 P(A)+P(B)=1

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