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