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i) The number of customers who bought Pepsi most often is =38%
% of those who bought Coke most often=41%
Thus 38/41*100~ 93%

ii) Out of the customers surveyed, the total number who bought either 7-UP or Dr Pepper is closest to= 15% of 1006 +2% of 1006= 150+21= 171 ~170
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Official Explanation

The answer to the first question is B. 38 customers bought Pepsi most often for every 41 customers who bought Coke; 38 is about 93% of 41.

The answer to the second question is C. A total of 17% of the 1,006 shoppers bought either 7-UP or Dr Pepper most often; 17% of 1,006 is close to 170.
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