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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
93% (01:13) correct
7%
(01:01)
wrong
based on 103
sessions
History
Date
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Not Attempted Yet
For each size of paper, a certain machine makes copies of an original document at a constant rate. How many copies of one original letter-size document does the machine make per minute?
(1) The machine makes 100 copies of one original letter-size document in 6 minutes and 40 seconds.
(2) The machine takes twice as long to make 11 × 17 copies as it takes to make letter-size copies.
(1) The machine makes 100 copies of one original letter-size document in 6 minutes and 40 seconds.
(2) The machine takes twice as long to make 11 × 17 copies as it takes to make letter-size copies.
06 Jul 2021, 10:39
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taha1234
We know we're trying to copy a letter-sized document, but are the copies we're making letter-sized too? We're left to guess, and the question really needs to tell us. I suppose you might think the word "copy" means the copies are identical to the original in size, but that's not how we use the word "copy" in real life, when talking about photocopying. The two statements would only make sense together if copies are the same size as originals, so because of that, I'll guess that we're making letter-sized copies here, but if the OA is something other than 'A' because they were trying to build in some 'trick' about the sizes of copies, the question design is faulty. If copies match originals in size, then Statement 1 tells us how quickly we can make letter-sized copies (we make 100 copies every 400 seconds, so 1 copy every 4 seconds, and 15 copies every 60 seconds), so it's sufficient, and Statement 2 does not tell us how quickly the copier works (we have no idea how fast the copier is, only that it takes longer to make big copies than to make letter-sized ones), so it is not sufficient, and the answer is A.
06 Jul 2021, 12:00
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taha1234
We are looking for a rate.
Statement 1:
This is a rate so sufficient.
Statement 2:
11*17 papers are unrelated to the question. Insufficient.
Ans: A
