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