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26 May 2017, 04:41
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Is the sum of the selling prices of the 3 products greater than \(8.5?\\
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(1) The lowest selling price of the 3 products is\)2.9
(2) The 2nd highest selling price of the 3 products is $4.3
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(1) The lowest selling price of the 3 products is\)2.9
(2) The 2nd highest selling price of the 3 products is $4.3
26 May 2017, 04:41
Kudos
Bookmarks
Official Solution:
If you take the 1st step of the variable approach and modify the original condition and the question, you must find the least value when the question is "greater than". In other words, if the least value of the sum of 3 products is greater than \(8.5, then they are all big (greater than\)8.5).
In the original condition, there are 3 variables (prices of 3 products) and in order to match the number of variables to the number of equations, there must be 3 equations. Therefore, E is most likely to be the answer. By solving con 1) and con 2),
In the case of con 1), the least value of the sum of the prices of 3 products=\(2. 9+\)2.9+\(2.9=\)8.7>\(8.5, hence yes, it is sufficient. In the case of con 2), the least value of the sum of the prices of 3 products=\)0+\(4. 3+\)4.3=\(8.6>\)8.5, hence yes, it is sufficient. Therefore con 1) = con 2), so D is the answer.
Answer: D
If you take the 1st step of the variable approach and modify the original condition and the question, you must find the least value when the question is "greater than". In other words, if the least value of the sum of 3 products is greater than \(8.5, then they are all big (greater than\)8.5).
In the original condition, there are 3 variables (prices of 3 products) and in order to match the number of variables to the number of equations, there must be 3 equations. Therefore, E is most likely to be the answer. By solving con 1) and con 2),
In the case of con 1), the least value of the sum of the prices of 3 products=\(2. 9+\)2.9+\(2.9=\)8.7>\(8.5, hence yes, it is sufficient. In the case of con 2), the least value of the sum of the prices of 3 products=\)0+\(4. 3+\)4.3=\(8.6>\)8.5, hence yes, it is sufficient. Therefore con 1) = con 2), so D is the answer.
Answer: D
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