俗话说:工欲善其事必先利其器。很多参加了新版gre考试的同学都觉得数学有点难度,相信这其中的原因还是由于考生在新版gre数学复习时没有把基础打牢。如果新版gre数学基本考点都没有复习到,如何能拿到分数呢?所以说,想要新版gre数学考好,复习的时候一定要把基本概念和重要考点都弄扎实。
今天针对新版gre数学复习,小编给大家整理的是关于AT least One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,突破新版gre数学难的困境。
新版gre数学复习重要考点: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 .
Example:
There are 20 quarters, 33 nickels, and 47 pennies in a jar. The probability that a randomly selected coin is a quarter= 20/=20/100=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.
上一篇: GRE数学备考建议
下一篇: 新版gre数学复习重要考点:排列
国际英语资讯:1 rescued, 4 missing in jade mine collapse in Myanmars northernmost state
国内英语资讯:China Focus: 17 dead or missing as rainstorms sweep central, east, south China
《世界资讯报》停刊牵出手机安全隐患
国际英语资讯:Boeing 737 MAX unlikely to restart carrying passengers by 2020: officials
国内英语资讯:China to reduce waste with green packaging
神奇飞行汽车亮相美国 已获准上路
假小子,娘娘腔更可能成同性恋
你在等待什么?What are you still waiting for?
国际英语资讯:EU opens new mission in Kuwait to enhance ties
国际英语资讯:U.S. govt conducts low-key operations to round up undocumented immigrants