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