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