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