# The table below shows expenditure on food of 25 households in a locality. Find the mean daily expenditure on food by a suitable method.

## Solution :

Let the assumed mean, A = 225, class size, h = 50

So, $$u_i$$ = $$x_i – A\over h$$ = $$x_i – 225\over 50$$

So, Mean = A + h$$\sum f_iu_i\over \sum f_i$$ = 225 + 50 $$\times$$ $$-7\over 25$$ = 225 – 14 = 211

Hence, the mean daily expenditure on food is 211 rupees.