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