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Find the mode of the following data:

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Since the maximum number of consumers (is 20) have got monthly consumption in the interval 120-140, 

the model class is 120 -140. 

The lower boundary (l) of the modal class = 120. 

The class size (h) = 20 

The frequency of modal class (f1) = 20 

The frequency of the class preceding the modal class (f0) = 16. 

The frequency of the class succeeding the modal class (f2) = 14.

Now, using the formula:

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