The table below shows the daily expenditure on food of 25 household in a locality

Let the assumed mean a = 225 and h = 50

Now,

$\sum f_{i}=25$

$\sum f_{i} u_{i}=-7$

Mean, $\bar{x}=a+\left(\frac{\sum f_{i} u_{i}}{\sum f_{i}}\right) \times h$

$=225+\left(\frac{-7}{25}\right) \times(50)$

$=225-14$

$=211$

Therefore, mean daily expenditure on food is Rs 211.