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