新gre數學重要考點：At Least Once

　　2023新gre考試實施以來，不僅對寫作部分茫然不知所措，就連我們所擅長的數學也甚是擔憂，相信這其中的原因還是由于考生在新gre數學復習時沒有把基礎打牢。如果新版gre數學基本考點都沒有復習到，如何能拿到分數呢?所以說，想要新版gre數學考好，復習的時候一定要把基本概念和重要考點都弄扎實。

　　At Least Once

　　If probability of an event happening is p, then the probability that the event happens at least once in n trials is 1-n.

　　Example:

　　To understand the equation follow these steps:

　　1.The probability of the event not happening is 1-p.

　　2.The probability it wont happen n-times in a row is n.

　　3.Probability it will happen at least once is 1-n.

　　Probability that a roll of a six-sided die land with face 1 is 1/6.Then the probability that 1 will turn up at least once in 3 tries:=1-3=1-3.

　　Remember:

　　It is much harder to directly calculate the at-least-once probability.

　　由于美國數學基礎教育的難度增加導致數學考試越來越難，但新gre數學復習考點都是高中時候學到的知識點，考生不要過于緊張，把基本概念弄明白，再記住一些新版gre數學必備的詞匯，那么相信新版gre數學應該沒有問題。

　　2023新gre考試實施以來，不僅對寫作部分茫然不知所措，就連我們所擅長的數學也甚是擔憂，相信這其中的原因還是由于考生在新gre數學復習時沒有把基礎打牢。如果新版gre數學基本考點都沒有復習到，如何能拿到分數呢?所以說，想要新版gre數學考好，復習的時候一定要把基本概念和重要考點都弄扎實。

　　At Least Once

　　If probability of an event happening is p, then the probability that the event happens at least once in n trials is 1-n.

　　Example:

　　To understand the equation follow these steps:

　　1.The probability of the event not happening is 1-p.

　　2.The probability it wont happen n-times in a row is n.

　　3.Probability it will happen at least once is 1-n.

　　Probability that a roll of a six-sided die land with face 1 is 1/6.Then the probability that 1 will turn up at least once in 3 tries:=1-3=1-3.

　　Remember:

　　It is much harder to directly calculate the at-least-once probability.

　　由于美國數學基礎教育的難度增加導致數學考試越來越難，但新gre數學復習考點都是高中時候學到的知識點，考生不要過于緊張，把基本概念弄明白，再記住一些新版gre數學必備的詞匯，那么相信新版gre數學應該沒有問題。