Draw histogram and frequency polygon
Age integers
0_10
10_20
20_30
30_40
40_50
50_60
60_70
Number of patient
30
90
40
60
20
120
30
In class 9th
Age integers
0_10
10_20
20_30
30_40
40_50
50_60
60_70
Number of patient
30
90
40
60
20
120
30
In class 9th
