Here, the maximum class frequency is 25.

The class corresponding to this frequency is the modal class. ⇒ modal class = 26 - 30

∴ lower limit of the modal class (l) = 26

Modal class size (h) = 4

Frequency of the modal class (f₁) = 25

Frequency of class preceding the modal class (f₀) = 20

Frequency of class succeeding the modal (f₂) = 22

Mode is given by,

⇒

⇒

⇒ Mode = 26 + 2.5 = 28.5

Hence, the mode is 28.5.