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