What is the lower limit of the modal class of the following distribution ?
Age in years 0 - 10 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60
Number of patients 16 13 6 11 27 18

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Solution

Modal class of the distribution is the class which have the highest frequency ( number of patients )

The age group $40 - 50$ has the highest no. of patients ( $27$ )

So, $40 - 50$ is the modal class and the lower limit of this class is $40$

Suggest Corrections

x	5-10	10-20	20-30	30-40	40-50	50-60
f	4	8	12	16	9	5

Marks:	0-10	10-20	20-30	30-40	40-50	50-60
Number of students:	7	10	23	51	6	3

Class	0-10	10-20	20-30	30-40	40-50
Frequency	7	15	13	17	10

Age in years	0 - 10	10 - 20	20 - 30	30 - 40	40 - 50	50 - 60
Number of patients	16	13	6	11	27	18

Marks	0 - 10	10 - 20	20 - 30	30 - 40	40 - 50	50 - 60
Number of students	8	7	13	12	30	25