数学是GMAT考试中最需要大家经常练习的部分,这在我们的以往的考试中大家就体会过了。GMAT数学并不难但是又很考验大家的基础知识的掌握程度,所以多做一些练习题多发现自己的薄弱部分是很有必要的,志在考GMAT数学满分的同学更要不断加大自己的练习量,天道小编具体为大家展示一些练习题并给出解析过程: 1、There are 1200 respondents to a poll, each favoring their preference for candidates A, B, and C. 54% favored A, 48% favored B, and 42% favored C, and there is 30% favored both A and B. Whats the largest possible number of respondents favoring C, but not CB, nor C A. 【答案】12000.28=336 【思路】题目问只选C的最大可能数是多少,要使这个数最大,就要满足所有选C的人,都不会同时选A或者B。即P=1-P=1-=1-=0.28。 2、A plane flied a distance of 800 miles at 360m/h with wind speed. And flied back at 260m/h with wind against it. Whats the average speed of the round-trip? 【答案】约等于302m/h 【思路】将题目理解为单程800m,round-trip 1600m,两个时速中已计入风速的影响,不另行计算。则第一段距离800m,时速360m/h,用时20/9h;第二段距离800m,时速260m/h,用时40/13h。则全程的平均时速=1600/=9360/31,约等于302m/h。 |