新GRE数学全部考点及解析(15).

2017-08-09 作者： 260阅读

　　新GRE数学考试要求的是中学的数学知识，考生们对于新GRE数学上面来说还是比较有把握，不过说到具体的GRE数学考点要求就不一定这么清楚。下面就为大家介绍新GRE数学考点及这些GRE数学考点解析，帮助考生们系统的复习一遍新GRE数学，梳理整合新GRE数学考试所需要的知识。

　　GRE考试数学考点：Geometric Figures

　　Geometric Figures

　　If a point is selected at random inside a geometric figure, then the probability that the selected point lies inside a particular region is the ratio of their areas:

　　area of the particular region inside the figure/area of the whole figure.

　　Example:

　　The probability that a randomly selected point within the square lies inside the circle=area of circle/area of square=∏r2/(4r2)= ∏/4.

　　Remember:

　　If the particular region is not completely inside the figure, then use only the area that is inside the figure.

　　GRE考试数学考点：Combinations of Choices

　　Combinations of Choices

　　If there are n choices for one type and m choices for second type, then number of combinations for both types is the product of choices:n*m.

　　Example:

　　If there are 3 kinds of breads to choose from and 4 kinds of meats, then we can make 3*4=12 different sandwiches.

　　If an alphabet has 26 letters, then the number of possible 2 letter word is 26*26=676.All of them may not be vaild words.

　　Remember:

　　Do not add the choices to get the total combinations.

　　The product rule can be applied to more than two types of choices: if there are 3 kinds of breads, 4 kinds of meats, and 6 kinds of cheeses, then we can make 3*4*6=72 different sandwiches.

　　以上就是新GRE数学考点及GRE数学考点解析的介绍，希望这些知识点的介绍可以帮助大家复习新GRE数学，为大家复习新GRE数学提供条件。希望考生们认真复习新GRE数学考试，能够取得自己理想的成绩。澳际也会不断的为大家分享更多有助于考生们复习考试的新GRE考试材料及技巧。