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