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