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