GRE考试

根据网考网考试中心的统计分析，以下试题在2019/1/18日GRE考试习题练习中，答错率较高，为：81%
【单选题】

If x+y=a,y+z=b, andx+z=c, whatisthe average (arithmetic mean) of x, y, and z

网考网参考答案：D，答错率：81%
网考网试题解析：
**Use TACTIC 2, Chapter 11: substitute for the variables. Let x = 1, y = 2, and z = 3. Then the average of x, y, and z is 2. When a = 1 + 2 = 3, b=2+3 =5, andc= 1 + 3 = 4, which of the choices equals 2 Only document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>