Q. 54.3( 277 Votes )

In a retail marke

Answer :

The above-given data can be represented in the form of a table as below:
Let a = 57

Now, the mean of the deviation can be calculated as follows:



where ,
fi = frequency of the ith class
di = xi - a
a = assumed mean of the data



= 0.1875


Mean can be calculated as follows:


=

where, a = assumed mean of the data

= 0.1875 + 57


Mean = 57.1875
        ≈ 57.19
Hence, the mean of the given data is 57.19.

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