Find the mode of the following distribution:

Here, the maximum no. of students is 20, and the class corresponding to this frequency is 20 – 30

So, the modal class is 20 – 30.

lower limit (l) of modal class = 20,

class size(h) = 10

frequency (f₁) of the modal class = 20

frequency (f₀) of class preceding the modal class = 6

frequency (f₂) of class succeeding the modal class = 10

Now, let us substitute these values in the formula

= 20 + 5.83

= 25.83