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