Q. 75.0( 1 Vote )

The number of sha

Answer :

This is a grouped frequency distribution.


Notice the data in ‘number of companies’, is small and the class in ‘Number of shares’ have equal intervals. So, we can use direct method for ease of calculation and can rely on the answer for accuracy.


So, create the table again as we need to represent midpoints and frequency. Re-creating the table ensures ease of calculation.


The calculation is done on a table and we can easily extract data from it.


We have,



So now, we have


xifi = 7000 and fi = 20


Using direct method,


Mean is given by



[Using values in the table]


Mean = 350


Thus, mean is 350.


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