The average score of a mathematics test in a class is 70 points, the pass rate is 75%, and the average score of the passing students is 80, so what is the average score of the failing students?
某班一次数学考试平均分数为70分，及格率75%，及格学生的平均分数为80，那么不及格学生的平均分数为多少分．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<gadget id="calculator">70 - 60</gadget>
<output>10</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">10 / (1/4)</gadget>
<output>40</output>

<result>40</result>