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