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