The following data gives the distribution of total monthly household expenditure of 200 families of a village. Find the modal monthly expenditure of the families. Also, find the mean monthly expenditure.
Assertion (A): The step-deviation method of computing the mean is used mainly to reduce the arithmetic when class marks and frequencies are large. Reason (R): In the step-deviation method, uᵢ = (xᵢ − a)/h, where h is the common class size.
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