2013年新gre考试:gre数学考点之Conditional详解
Conditional Probability of event A conditioned on the fact that event B has happened is called the conditional probability and written as P(AIB). P(AIB)=Probability Both A and B happens/ Probability B happens. Example: A six-sided die with faces from 1 to 6 is rolled twice. What is the probability that the face 5 turned up on first try given that the sum of the two faces is 9? P(sum of faces is 9)=4/36=1/9. P(face 5 turns up on the first try and sum is 9)=(1/6)*(1/6)=1/36. P(face 5 turned up on first try given sum is 9)=(1/36)*(1/9)=1... [ 查看全文 ]2013年新gre考试:gre数学考点之Conditional详解的相关文章
2013年新gre考试:gre数学考点之Geometric Figures详解
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...[ 查看全文 ]2013年新gre考试:gre数学考点之Polynomials
今天针对新gre数学复习,小编给大家整理的是关于Polynomials的相关内容,这些概念在考试中一定会考到的。希望考生能再接再厉,取得一个好成绩,突破新gre数学难的困境。 Polynomials Any expression with one or more terms is called polynomial. Example: 3x+2,4x2-x+2,and 4x+3xy+y2a...[ 查看全文 ]2013年新gre考试:gre数学考点之Substitution详解
新GRE数学考试的考点都是高中时候学到的知识点,考生不要过于紧张,把基本概念弄明白,再记住一些新GRE数学必备的词汇,那么相信新GRE数学应该没有问题。下面小编给大家整理的是关于Substitution的相关内容,希望对各位考生有所帮助。 Substitution Substitution is a method where one or more variables in an expres...[ 查看全文 ]2013年新gre考试:gre数学考点之Subtracting Polynomials详解
今天针对新gre数学复习,给大家整理的是关于Subtracting Polynomials的相关内容,这些概念在考试中一定会考到的。希望考生能再接再厉,取得一个好成绩,突破新gre数学难的困境。 To subtract polynomial from another, subtract the like terms. Like terms are those with the same va...[ 查看全文 ]2013年新gre考试:gre数学考点之Total Members详解
Total Members Sometimes there are members that do not belong to either set A or B.In that case the total number of members=Size A+Size B-Number of common members+Number of members not in A or B. ...[ 查看全文 ]2013年新gre考试:gre数学考点Evaluating Expressions详解
Evaluating Expressions To evaluate an expression, plug in the specific values for the variables and simplify. Example For x=2, the expression 3x+5 evaluates to 3*2+5=11. For x=2 and y=1, the exp...[ 查看全文 ]