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