Question

In a class test 50 students obtained marks are as follows. Find the model class and median class
Marks 0-20 20-40 40-60 60-80 80-100
Number 4 6 25 10 5​

Answer 1

Step-by-step explanation:

We know,

Modal class is the class with highest number of frequency.

According to the above given information

Modal class = 40 - 60

Now,

We know,

Median = l + ( n`+ cf /f) × h

where,

n` = n/2 =50/2 = 25

Median class = 40 - 60

l = 40

cf = 10

f = 25

h = 20

Median = 40 + ( 25 + 10/ 25) × 20

= 40 + ( 35/25) × 20

= 40 + 28

= 68

Therefore, Median = 68

I hope it helps..!!