(Q13). In a retail market, fruit vendors were selling oranges kept in packing baskets. These baskets contained varying number of oranges. The following was the distribution of oranges.

Number of oranges	10-14	15-19	20-24	25-29	30-34
Number of baskets	15	110	135	115	25

Find the mean number of oranges kept in each basket. Which method of finding the mean did you choose?

Solution :

Number of oranges (C.I)	Number of baskets (fi)	xi	ui = xi - a h h = 5	fiui
10-14	15	12	-2	-
15-19	110	17	-1	-
20-24	135	22 a	0
25-29	115	27	1
30-34	25	32	2
-	∑fi = 400	-	-	∑fiui =

Here we use step deviation method where a = 135, h = 5,a multiple of all d_i