Question

for the following distribution marks are below 10, below 20, below 30, below 40, below 50, below 60, number of students are 3, 12, 27, 57, 75, 80, write the modal class​

Answer 1

Answer:

Marks number of students class interval frequency

below 10 3 0−10 3

below 20 12 10−20 12−3=9

below 30 27 20−30 27−12=15

below 40 57 30−40 57−27=30

below 50 75 40−50 75−57=18

below 60 80 50−60 80−75=5

Modal class is the class which has the highest frequency.

The highest frequency is 30 which is associated with the class 30−40

Therefore, the modal class is 30−40