Mode = L₁ + (\(\frac{D_1}{D_1 + D_2}\))C
D₁ = frequency of modal class - frequency of the class before it
D₁ = 5 - 2 = 3
D₂ = frequency of modal class - frequency of the class that offers it
D₂ = 5 - 3 = 2
L₁ = lower class boundary of the modal class
L₁ = 5 - 5
C is the class width = 8 - 5.5 = 3
Mode = L₁ + (\(\frac{D_1}{D_1 + D_2}\))C
= 5.5 + \(\frac{3}{2 + 3}\)C
= 5.5 + \(\frac{3}{5}\) x 3
= 5.5 + \(\frac{9}{5}\)
= 5.5 + 1.8
= 7.3 \(\approx\) = 7