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