Multiple Times) E5 ~' _+ o" R: F( {1 j c5 ~
If probability of an event happening is p, then the probability that the event happens n times in a row is p∧n.
\! {) F2 e3 ?' {% D Example:
3 O7 ~% O6 w" v, H! M* r The probability that a coin toss results in head is 0.5. Then the probability that when the coin is tossed twice, both of them are head is 0.5∧2=0.25., V& r; V& l. d# l7 ^$ K
Probability that a roll of a six-sided die land with face 1 is 1/6. Then the probability that 1 will turn up three times in a row is (1/6)∧3. Remember:3 S4 _, o# T1 U% x
Note that probability of the event happening does not change from trial to trial.1 D$ U4 j3 X2 ~9 y' V
由于美国数学基础教育的难度增加导致数学考试越来越难,但新gre数学复习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,再记住一些新版gre数学必备的词汇,那么相信新版gre数学应该没有问题。 |