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