Question

please solve this question friends

Answer 1

class interval frequency
15-25 5
25-35 10
35-45 20
45-55 9
55-65 6
65-75 2
75-85 0
l=35
f1=20
fo=10
f2=9
h=10.

l+[f1_-fo] ×h
2f1-fo-f2

35 {20-10}
______ ×10
2×20-10-9

35×10
_____ ×10
40-19

350
____×10
21
3500/21