"班级"	"不及格科目数"	"学生人数"
"1班"	2	3
"2班"	3	4
"4班"	2	3
"2班"	1	10
"3班"	4	1
"1班"	3	8
"2班"	4	2
"3班"	2	10
"4班"	1	5
"3班"	3	6
"4班"	4	7
"1班"	5	9