"班级"	"不及格科目数"	"学生人数"
"1班"	5	3
"2班"	2	10
"3班"	1	9
"1班"	3	6
"3班"	5	4
"4班"	1	4
"2班"	5	6
"3班"	3	9
"4班"	5	5
"2班"	1	4
"1班"	4	3
"2班"	3	4
"3班"	2	7
"4班"	3	9