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CSS General Science & Ability Paper 2016
Q.No.11 (a) A distribution company provides households to departmental stores within a 50 kilometers radius. The table below shows how far each departmental store is from the godown of the distribution company.

Distance from the godown of the distribution company	Number of Stores
10 kilometers or less	03
11 to 20 kilometers	15
21 to 30 kilometers	26
31 to 40 kilometers	20
41 to 50 kilometers	16

(i) How many stores does the distribution company serve?
(ii) What is the most common distance of stores from the company’s godown?
(iii) How many stores are 35 km or more from the godown?
(iii) What percentage of stores are 31 km or more from the godown?

Answer
Consider the table again,

Distance from the godown of the distribution company	Number of Stores
10 kilometers or less	03
11 to 20 kilometers	15
21 to 30 kilometers	26
31 to 40 kilometers	20
41 to 50 kilometers	16
Total Number of Stores	80

(i) The distribution company serves 80 stores.
(ii) The most common distance of stores from the company’s godown is 21 to 30 kilometers (because it has the maximum frequency; 26 stores).
(iii) There are 16 stores which are 41 km or more from the godown, and 20 stores which are between 31 to 40 km from the godown. From the table we cannot say anything that how many of these 20 stores are 35 km or more from the godown.
(iv) There are 20+16=36 stores which are 31 km or more from the godown. Hence, the percentage of these stores is given as,