"班级"	"不及格科目数"	"学生人数"
"1班"	3	6
"2班"	5	3
"3班"	2	6
"4班"	4	1
"1班"	5	1
"2班"	4	1
"4班"	5	10
"1班"	4	8
"2班"	3	10
"3班"	4	4
"4班"	1	3