AMC 8 1994 Problem 20

AMC8 1994 年第 20

比与比例★★★☆☆
Let $W,X,Y$ and ZZ be four different digits selected from the set {1,2,3,4,5,6,7,8,9}.\{ 1,2,3,4,5,6,7,8,9\}. If the sum W/X + Y/Z is to be as small as possible, then W/X + Y/Z must equal
$W,X,Y$ZZ 是从集合 {1,2,3,4,5,6,7,8,9}\{1,2,3,4,5,6,7,8,9\} 中选出的四个不同数字。 若要和 W/X + Y/Z 尽可能小,则 W/X + Y/Z 必须等于
  1. A.217\dfrac{2}{17}
  2. B.317\dfrac{3}{17}
  3. C.1772\dfrac{17}{72}
  4. D.2572\dfrac{25}{72}
  5. E.1336\dfrac{13}{36}

正确答案 · Correct Answer

D

解析 · Solution

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