Mark is older than Frank, but younger than David. If m, f, and d represent the a

游客2024-01-12  15

问题 Mark is older than Frank, but younger than David. If m, f, and d represent the ages, in years, of Mark, Frank, and David, respectively, which of the following is true?
   ______d<f<m
   ______f<m<d
   ______d<m<f
   ______f<d<m

选项

答案  You are given that Mark, m, is older than Frank, f. Therefore, f<m. You are also given that Mark, m, is younger than David, d. Therefore, d>m. Mark’s age is between Frank and David’s ages, so f<m<d.

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