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