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