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