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Q.

A stopwatch was used to find the time that it took for group of students to run 100m.


Question Image

The sum of lower limits of median class and modal class is


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a

60

b

80

c

40

d

100 

answer is B.

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Detailed Solution

Given,
Question ImageWe know that, the median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average.
Also, modal class is the class with the highest frequency.
The modal class and median class is 40−60  .
The lower limit and upper limit of the median class is 40 and 60 respectively.
The lower limit and upper limit of the modal class is 40 and 60 respectively.
Therefore, the sum of lower limits of median class and modal class is,
Sum =40+40   Sum=80  
Hence, the correct option is (2).
 
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