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