新版gre数学复习重要考点：At Least Once
<p> 俗话说：工欲善其事必先利其器。很多参加了新版<span word="gre">gre</span>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<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> 今天针对新版<span word="gre">gre</span>数学复习，小编给大家整理的是关于<span word="At">At</span> <span word="Least">Least</span> <span word="Once">Once</span>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<span word="gre">gre</span>数学难的困境。</p><p> 新版<span word="gre">gre</span>数学复习重要考点：<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>
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