Class corresponding to maximum frequency = (4-8)

f₁ (Frequency of the modal class) = 8

f₀ (Frequency of the class preceding the modal class) = 4

f₂ (Frequency of the succeeding modal class) = 5

l(lower limit) = 4

h(width of class) = 4

Mode =

⇒ Mode =

Mode = 6.29