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