新gre数学考点介绍：At Least Once
<p> 新<span word="gre">gre</span>考试实施以来，不仅对写作部分茫然不知所措，就连我们所擅长的数学也甚是担忧，相信这其中的原因还是由于考生在新<span word="gre">gre</span>数学复习时没有把基础打牢。如果新版<span word="gre">gre</span>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<span word="gre">gre</span>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。</p><p> <span word="At">At</span> <span word="Least">Least</span> <span word="Once">Once</span></p><p> <span word="If">If</span> <span word="probability">probability</span> <span word="of">of</span> <span word="an">an</span> <span word="event">event</span> <span word="happening">happening</span> <span word="is">is</span> <span word="p">p</span>, <span word="then">then</span> <span word="the">the</span> <span word="probability">probability</span> <span word="that">that</span> <span word="the">the</span> <span word="event">event</span> <span word="happens">happens</span> <span word="at">at</span> <span word="least">least</span> <span word="once">once</span> <span word="in">in</span> <span word="n">n</span> <span word="trials">trials</span> <span word="is">is</span> 1-<span word="n">n</span>.</p><p> <span word="Example">Example</span>:</p><p> <span word="To">To</span> <span word="understand">understand</span> <span word="the">the</span> <span word="equation">equation</span> <span word="follow">follow</span> <span word="these">these</span> <span word="steps">steps</span>:</p><p> 1.<span word="The">The</span> <span word="probability">probability</span> <span word="of">of</span> <span word="the">the</span> <span word="event">event</span> <span word="not">not</span> <span word="happening">happening</span> <span word="is">is</span> 1-<span word="p">p</span>.</p><p> 2.<span word="The">The</span> <span word="probability">probability</span> <span word="it">it</span> <span word="wont">wont</span> <span word="happen">happen</span> <span word="n">n</span>-<span word="times">times</span> <span word="in">in</span> <span word="a">a</span> <span word="row">row</span> <span word="is">is</span> <span word="n">n</span>.</p><p> 3.<span word="Probability">Probability</span> <span word="it">it</span> <span word="will">will</span> <span word="happen">happen</span> <span word="at">at</span> <span word="least">least</span> <span word="once">once</span> <span word="is">is</span> 1-<span word="n">n</span>.</p><p> <span word="Probability">Probability</span> <span word="that">that</span> <span word="a">a</span> <span word="roll">roll</span> <span word="of">of</span> <span word="a">a</span> <span word="six">six</span>-<span word="sided">sided</span> <span word="die">die</span> <span word="land">land</span> <span word="with">with</span> <span word="face">face</span> 1 <span word="is">is</span> 1/6.<span word="Then">Then</span> <span word="the">the</span> <span word="probability">probability</span> <span word="that">that</span> 1 <span word="will">will</span> <span word="turn">turn</span> <span word="up">up</span> <span word="at">at</span> <span word="least">least</span> <span word="once">once</span> <span word="in">in</span> 3 <span word="tries">tries</span>:=1-3=1-3.</p><p> <span word="Remember">Remember</span>:</p><p> <span word="It">It</span> <span word="is">is</span> <span word="much">much</span> <span word="harder">harder</span> <span word="to">to</span> <span word="directly">directly</span> <span word="calculate">calculate</span> <span word="the">the</span> <span word="at">at</span>-<span word="least">least</span>-<span word="once">once</span> <span word="probability">probability</span>.</p><p> 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<span word="gre">gre</span>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<span word="gre">gre</span>数学必备的词汇，那么相信新版<span word="gre">gre</span>数学应该没有问题。</p>
页:
[1]