Đáp án đúng: C
Giải chi tiết:\(\begin{array}{l}\,\,\,\frac{3}{5} - \left| {x - \frac{1}{2}} \right| = 25\% \\\,\,\,\,\,\,\,\frac{3}{5} - \left| {x - \frac{1}{2}} \right| = \frac{1}{4}\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left| {x - \frac{1}{2}} \right| = \,\frac{3}{5} - \frac{1}{4}\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left| {x - \frac{1}{2}} \right| = \frac{7}{{20}}\\\,\,\,\,\,\,\,\,\, \Rightarrow \left[ \begin{array}{l}x - \frac{1}{2} = \frac{7}{{20}}\\x - \frac{1}{2} = \frac{{ - 7}}{{20}}\end{array} \right.\,\, \Rightarrow \left[ \begin{array}{l}x = \frac{7}{{20}} + \frac{1}{2} = \frac{{17}}{{20}}\\x = \frac{{ - 7}}{{20}} + \frac{1}{2} = \frac{3}{{20}}\end{array} \right. \Rightarrow \left[ \begin{array}{l}x = \frac{{17}}{{20}}\\x = \frac{3}{{20}}\end{array} \right.\end{array}\)
Chọn C