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