(Q14). The table below shows the daily expenditure on food of 25 households in a locality.

Daily Expenditure(₹)	100-150	150-200	200-250	250-300	300-350
Number of households	4	5	12	2	2

Find the mean daily expenditure on food by a suitable method.

Solution :

Daily Expenditure(₹)	Number of households(fi)	xi	ui = xi - a h h = 50	fiui
100-150	4	125 a	0
150-200	5	175	1
200-250	12	225	2
250-300	2	275	3
300-350	2	325	4
-	∑fi = 25	-	-	∑fiui =

Here a = 125, h = 50, ∑f_iu_i =

Now,