GMAT数学题库经典试题解析(1)
<p> 下面为大家整理了<span word="GMAT">GMAT</span>数学题库经典试题解析，供考生们参考，以下是详细内容。</p><p> 1.一枚硬币向上抛，两面的机率各为一半，问连抛三次，同一面的机率。</p><p> 同一面有两种情况：故1/8+1/8=1/4</p><p> 2. 11球，6红，5蓝，<span word="without">without</span> <span word="replacement">replacement</span>, 问取一蓝一红的<span word="possibility">possibility</span>. 6/11</p><p> 第一次取蓝的情况 <span word="C">C</span>15<span word="C">C</span>16 .第一次取红的情况: <span word="C">C</span>16<span word="C">C</span>15， 总共的情况为<span word="C">C</span>111<span word="C">C</span>110=110 则概率为 60/110=6/11</p><p> 3. 大于700的三位整数中，有多少是奇数，要求每个数字都不为零，且每位数字都不同。答案： 91 <span word="How">How</span> <span word="to">to</span> <span word="get">get</span> <span word="the">the</span> <span word="answer">answer</span>?</p><p> 4. <span word="is">is</span> <span word="xyz">xyz</span>? 我觉得是<span word="C">C</span></p><p> . <span word="xyz">xyz</span>=1 . <span word="xyz">xyz</span>^21 <span word="KEY">KEY</span>: <span word="e">e</span> <span word="why">why</span> <span word="not">not</span> <span word="C">C</span>?</p><p> 5.<span word="X">X</span>,<span word="Y">Y</span>,<span word="Z">Z</span>是三角形的三个边, 且<span word="X">X</span>2^1/2)</p><p> .1/2<span word="XYsin">XYsin</span>=1 而1/2<span word="XYsin">XYsin</span>1/2<span word="Y">Y</span>^2<span word="sin">sin</span></p><p> 故11/2<span word="Y">Y</span>^2<span word="sin">sin</span> =2/<span word="sin">sin</span>2</p><p> 所以 <span word="Y">Y</span>2^1/2</p><p> 6.</p><p> <span word="O">O</span></p><p> <span word="X">X</span> <span word="X">X</span></p><p> <span word="X">X</span> <span word="X">X</span> X</p><p> <span word="X">X</span> <span word="X">X</span> X X</p><p> <span word="X">X</span> <span word="X">X</span> X X X</p><p> <span word="M">M</span> <span word="M">M</span> <span word="M">M</span> <span word="M">M</span></p><p> 上图第一行<span word="O">O</span>表一小球, 第2,3,4行的<span word="X">X</span>表障碍物, 第6行表小槽. 小球从上落下,在第三行时</p><p> 受到障碍物的阻止, 其向左或右的机率相等, 各占50%. 以下依然. 问最后球掉到第六行的第二个</p>
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