"班级"	"不及格科目数"	"学生人数"
"1班"	5	6
"2班"	2	5
"3班"	4	3
"4班"	2	4
"1班"	3	10
"2班"	1	7
"3班"	2	3
"4班"	3	8
"1班"	4	4
"2班"	5	5
"2班"	4	1
"3班"	3	4