Question

A student noted the number of cars passing through a spot on a road for 100 periods, each of 3 minutes, and summarised this in the table given below.

Find the mode of the data.

Answer 1

Since the maximum frequency is 20, the modal class is 40 – 50. 

Lower boundary of the modal class ‘l’ = 40 

Frequency of the modal class, f₁ = 20 

Frequency of the class preceding the modal class, f₀ = 12

Frequency of the class succeeding the modal class, f₂ = 11 

Height of the class, h = 10;