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16 Sep 2014, 00:16
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C
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Difficulty:
15%
(low)
Question Stats:
75% (00:47) correct
25%
(00:53)
wrong
based on 893
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How many of the 810 new members registered on a website in June were from the USA?
(1) In June, the ratio of new members from the USA, Europe, and Asia was 4:3:2 respectively.
(2) In June, no new members were from locations other than the USA, Europe, and Asia.
(1) In June, the ratio of new members from the USA, Europe, and Asia was 4:3:2 respectively.
(2) In June, no new members were from locations other than the USA, Europe, and Asia.
16 Sep 2014, 00:17
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Official Solution:
How many of the 810 new members registered on a website in June were from the USA?
(1) In June, the ratio of new members from the USA, Europe, and Asia was 4:3:2 respectively/
The above is not sufficient to answer the question because we don't know whether there were new members from other parts of the world (Africa for example).
(2) In June, no new members were from locations other than the USA, Europe, and Asia. The above is also not sufficient to answer the question because it only tells us where the new members were from, but it does not give us any information about their distribution.
(1)+(2) The second statement tells us that all 810 new members were from the USA, Europe, and Asia. Statement (1) gives us the ratio of new members from each of these regions. Using this information, we can set up an equation: \(4x + 3x + 2x = 810\), where \(x\) is a common factor of the ratio. Solving the equation, we get \(x = 90\). Therefore, the number of new members from the USA is \(4x = 4*90 = 360\). Sufficient.
Answer: C
How many of the 810 new members registered on a website in June were from the USA?
(1) In June, the ratio of new members from the USA, Europe, and Asia was 4:3:2 respectively/
The above is not sufficient to answer the question because we don't know whether there were new members from other parts of the world (Africa for example).
(2) In June, no new members were from locations other than the USA, Europe, and Asia. The above is also not sufficient to answer the question because it only tells us where the new members were from, but it does not give us any information about their distribution.
(1)+(2) The second statement tells us that all 810 new members were from the USA, Europe, and Asia. Statement (1) gives us the ratio of new members from each of these regions. Using this information, we can set up an equation: \(4x + 3x + 2x = 810\), where \(x\) is a common factor of the ratio. Solving the equation, we get \(x = 90\). Therefore, the number of new members from the USA is \(4x = 4*90 = 360\). Sufficient.
Answer: C
General Discussion
04 May 2020, 17:12
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I think this is a good question to test your knowledge of the concept. I got 50/51 in this test, and I got this question wrong. I have learned now. Thank you.
