"班级"	"不及格科目数"	"学生人数"
"1班"	5	6
"2班"	2	3
"3班"	3	8
"4班"	4	5
"1班"	1	8
"3班"	4	1
"4班"	1	2
"2班"	5	9
"3班"	5	6
"4班"	5	1
"2班"	4	10