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