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