"班级"	"不及格科目数"	"学生人数"
"1班"	1	10
"2班"	4	5
"3班"	4	7
"4班"	2	5
"1班"	4	3
"2班"	5	6
"3班"	2	2
"4班"	1	4
"2班"	3	8
"4班"	3	4
"1班"	5	7
"2班"	2	8
"3班"	5	7
"4班"	5	1