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