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