考前必读：2019年GRE考试数学考点2

想要在考试中获得好成绩，就要在平时多花时间去复习，对于数学考试，我们更是需要时间去研究解题方法和思路，多加练习，今天小编就给大家带来了数学的考点，大家可以根据考点进行复习，在坦途网GRE考试频道还有很多相关的内容大家可以去看一看哦！

AT least One 　　If probability of event A happening is p and event B happening is q, then the probability that at least one of them happens is (p+q). 　　Example: 　　There are 20 quarters, 33 nickels, and 47 pennies in a jar. The probability that a randomly selected coin is a quarter= 20/(20+33+47)=20/100=0.2 and the coin is nickel = 33/100 =0.33.The probability it is either a quarter or a nickel = 0.2+0.33=0.53. 　　Remember: 　　The events needs to be mutually exclusive, that is if one happens the other cannot happen: a coin is either a quarter or nickel but not both. 

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