"班级"	"不及格科目数"	"学生人数"
"1班"	3	4
"2班"	3	5
"3班"	4	6
"4班"	5	3
"1班"	2	8
"2班"	2	10
"3班"	5	3
"4班"	1	6
"2班"	5	8
"3班"	1	3
"4班"	3	3
"4班"	2	5