Yuxiang Primary School held long-distance running and swimming competitions, with a total of 305 participants. There are 150 boys and 90 girls participating in the long-distance running competition, 120 boys and 70 girls participating in the swimming competition, and 110 boys participating in both competitions. May I ask: Girls who only participated in the swimming competition but not the long-distance running competition how many people?
渔乡小学举行长跑和游泳比赛，共305人参加．参加长跑比赛的有150名男生和90名女生，参加游泳比赛的有120名男生和70名女生，有110名男生两项比赛都参加了，请问：只参加游泳比赛而没有参加长跑比赛的女生有多少人？
<gadget id="calculator">120 - 110</gadget>
<output>10</output>

<gadget id="calculator">150 + 10</gadget>
<output>160</output>

<gadget id="calculator">305 - 160</gadget>
<output>145</output>

<gadget id="calculator">145 - 90</gadget>
<output>55</output>

<result>55</result>