"班级"	"不及格科目数"	"学生人数"
"1班"	5	6
"2班"	4	8
"4班"	4	9
"1班"	3	5
"2班"	2	4
"3班"	3	6
"4班"	5	7
"1班"	4	8
"2班"	5	6
"3班"	2	3
"4班"	3	3
"4班"	2	3