During the final examination in the last semester, the five-year class had 2 students who failed, and the passing rate was 95%. How many students are there in the five-year class?
五年一班在上学期期末检测时，有2名学生不及格，及格率是95%，五年一班共有学生多少名．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">2 / (1/20)</gadget>
<output>40</output>

<result>40</result>