If the average score of a test in a class is 70 points, and (3/4) of them pass the test, and their average score is 80 points, what is the average score of those who failed in the class?
某班一次考试的平均分数是70分，其中(3/4)的人及格，他们的平均分是80分，则该班不及格的人的平均分是多少分．
<result>40</result>