The average score of students in a certain school participating in a mathematics competition is 75 points. Among the contestants, there are more boys than girls (4/5), and the average score of girls is higher than that of boys (1/5). What is the average score of girls?
某校学生参加一次数学竞赛的平均成绩是75分，选手中男生人数比女生人数多(4/5)，而女生比男生的平均分高(1/5)，女生的平均分是多少分．
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) * 5</gadget>
<output>6</output>

<gadget id="calculator">6 + 9</gadget>
<output>15</output>

<gadget id="calculator">1_050 / 15</gadget>
<output>70</output>

<gadget id="calculator">(6/5) * 70</gadget>
<output>84</output>

<result>84</result>