GRE考试

根据网考网考试中心的统计分析，以下试题在2019/1/3日GRE考试习题练习中，答错率较高，为：38%
【单选题】
A、bag contains 3 red, 4 white, and 5 blue marbles. Jason begins removing marbles from the bag at random, one at a time. What is the least number of marbles he must remove to be sure that he has at least one of each color

A、3B、6
C、8
D、10
E、12

网考网参考答案：D，答错率：38%
网考网试题解析：
If Jason were really unlucky, what could go wrong in his attempt to get one marble of each color Well, his first nine picks might yield five blue marbles and four white ones. But then the tenth marble would be red, and now he would have at least one of each color. The answer is 10. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>