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