Bunuel wrote:
A certain manufacturer sells its products to stores in 113 different regions worldwide, with an average (arithmetic mean) of 181 stores per region. If last year these stores sold an average of 51,752 units of the manufacturer’s product per store, which of the following is closest to the total number of units of manufacturer’s product sold worldwide last year?
A) 10^6
B) 10^7
C) 10^8
D) 10^9
E) 10^10
We are given that a certain manufacturer sells its products to stores in 113 different regions, with an average (arithmetic mean) of 181 stores per region and 51,752 units per store.
Since we are asked, which of the following is
closest to the total number of units of manufacturer’s product sold worldwide last year, we can use estimation.
113 ≈ 100
181 ≈ 200
51,752 ≈ 50,000
Thus, the approximate number of units sold worldwide last year was:
100 x 200 x 50,000 = 1,000,000,000 = 10^9
Answer: D
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67% (01:47) correct 
