Data Sufficiency
Please determine whether the data provided by the statement s are sufficient to answer the question.
Working together but independently, Scott and Eric can address X envelopes in 18 hours. How long would it take Scott working alone to address X envelopes?
1. In M minutes, Scott addresses three times as many envelopes as Eric addresses in M minutes.
2. Eric can address X envelopes in 72 hours.
* If statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not;
* If statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not;
* If statement (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient;
* If EITHER statement BY ITSELF is sufficient to answer the question;
* If statement (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question, requiring more data pertaining to the problem.
not sure how to approach this one
Cant work this one out - any ideas?
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I went by this method.
(I) says that - In M minutes, Scott addresses three times as many envelopes as Eric addresses in M minutes. this means Scott is 3 times faster than Eric.
Suppose in the 18th minute Eric addressed L envelopes, then Scott would have addressed 3L envelopes.
We have 3L + L = X, ie. L=X/4
Since Scott did 3L envelopes in 18 hours, which is also 3(X/4) envelopes in 18 hours, he would take X = 18 * 4/3, i.e 24 hours if he had to complete it alone!!
Hence Sufficient
(II) Says Eric can address X envelopes in 72 hours. Now lets assume the Scott can complete X letters in Y hours.
Now from the main statement we have - 'Working together but independently, Scott and Eric can address X envelopes in 18 hours'
(1/72) + 1/Y = 1/18, and solving this we get Y= 24!
Hence Sufficient.
So answer should be D.
(I) says that - In M minutes, Scott addresses three times as many envelopes as Eric addresses in M minutes. this means Scott is 3 times faster than Eric.
Suppose in the 18th minute Eric addressed L envelopes, then Scott would have addressed 3L envelopes.
We have 3L + L = X, ie. L=X/4
Since Scott did 3L envelopes in 18 hours, which is also 3(X/4) envelopes in 18 hours, he would take X = 18 * 4/3, i.e 24 hours if he had to complete it alone!!
Hence Sufficient
(II) Says Eric can address X envelopes in 72 hours. Now lets assume the Scott can complete X letters in Y hours.
Now from the main statement we have - 'Working together but independently, Scott and Eric can address X envelopes in 18 hours'
(1/72) + 1/Y = 1/18, and solving this we get Y= 24!
Hence Sufficient.
So answer should be D.
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Shouldn't this be over in the math area?
Karen van Hoek, PhD
Verbal Specialist
Test Prep New York
maximize your score, minimize your stress
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Verbal Specialist
Test Prep New York
maximize your score, minimize your stress
www.testprepny.com
[email protected]