"班级"	"不及格科目数"	"学生人数"
"2班"	2	1
"3班"	1	10
"4班"	4	7
"2班"	4	2
"1班"	4	5
"3班"	4	10
"1班"	2	1
"2班"	5	8
"3班"	3	2