The table given below shows the daily expenditure on food of 30 households in a locality:

Find the mean and median of daily expenditure on food.

According to the direct method

Mean =

⇒ Mean =

⇒ Mean = 205

Total frequency(n) = 30

15 lies in the interval 200-250

so l (lower limit) = 200

c_f(Cumulative frequency of the preceding class 200-250) = 13

f (frequency of median class) = 12

h (class size) = 50

Median =

Median =

Median = 208.33