"班级"	"不及格科目数"	"学生人数"
"1班"	3	8
"2班"	3	7
"3班"	4	4
"4班"	2	5
"1班"	1	10
"3班"	5	6
"4班"	5	9
"2班"	5	6
"1班"	2	5
"2班"	1	9