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Q.

From the following choices, the sum of lower limits of the median class and modal class for the data given below is:


Question Image

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a

15

b

25

c

30

d

35  

answer is B.

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Detailed Solution

It is given a table with class and frequency.
Observe the table and find the cumulative frequency for the table.
Question ImageThe sum of the frequency is 66.
Since the value is even, the median value is,
N 2 = 66 2
=33
The median value lies in the interval 1015 .
So, the lower limit of the median class is 10 .
The highest frequency is 20 which lies in the interval 1520 .
So, the lower limit of modal class is 15 .
Lower limit of median class + Lower limit of modal class =10+15
=25
Hence, the value is 25 .
Hence, option 2) is correct.
 
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