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