The mode of the following distribution is Class interval :1-5 6-10 11-1516-20 21-25 Frequency: 471086

The given distribution is not a continuous

frequency distribution. So, we first convert

it into a continuous frequency distribution

as given below:

Class interval:	0.5-5.5	5.5-10.5	10.5-15.5	15.5-20.5	20.5-25.5
Frequency:	4	7	10	8	6

Clearly, 10.5-15.5 is the modal class such that

$l = 105, f = 10, f_{i} = 7, f_{2} = 8$ and $h = 5 .$

$∴$ Mode $e = l + \frac{f - f_{1}}{2 f - f_{1} - f_{2}} \times h = 10.5 + \frac{3}{5} \times 5 = 13.5$

The mode of the following distribution is
Class interval : 1-5 6-10 11-15 16-20 21-25
Frequency: 4 7 10 8 6