A certain school sent 60 athletes to participate in the City Youth Track and Field Invitational Competition, among which female athletes accounted for (1/4). During the official competition, there are several female players who are absent for some reason, so that the number of female players becomes (2/11) of the total number of players. Find the number of female players who officially participate.
某校派出60名选手参加市少年田径邀请赛，其中女选手占(1/4)．正式比赛时，有几名女选手因故缺席，这样就使女选手人数变为参赛选手总数的(2/11)，求正式参赛的女选手人数．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 11</gadget>
<output>2/11 = around 0.181818</output>

<gadget id="calculator">1 - (2/11)</gadget>
<output>9/11 = around 0.818182</output>

<gadget id="calculator">(3/4) / (9/11)</gadget>
<output>11/12 = around 0.916667</output>

<gadget id="calculator">60 * (11/12)</gadget>
<output>55</output>

<gadget id="calculator">60 * (3/4)</gadget>
<output>45</output>

<gadget id="calculator">55 - 45</gadget>
<output>10</output>

<result>10</result>