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23 Apr 2019, 12:51
Kudos
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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:
35%
(medium)
Question Stats:
68% (01:41) correct
32%
(02:10)
wrong
based on 141
sessions
History
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Suppose that a cows give b gallons of milk in c days. At this rate, how many gallons of milk will d cows give in e days?
(A) bde/(ac)
(B) ac/(bde)
(C) abde/c
(D) bcde/a
(E) abc/(de)
(A) bde/(ac)
(B) ac/(bde)
(C) abde/c
(D) bcde/a
(E) abc/(de)
Archit3110
Major Poster
23 Apr 2019, 21:03
Kudos
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Bunuel
IMO A bde/(ac)
per day milk ; b/a*c
and for d cows in e days ; bde/(ac)
26 Apr 2019, 15:32
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Bunuel
[Note: there is a typo in the question. Replace the $ sign with the letter c, and then the problem can be completed correctly.].
First, we see that the rate of the a cows is b gallons/c days. We also see that the rate of the d cows is x gallons/e days. Our goal is to solve for x.
We can set up the ratio:
a / (b/c) = d / (x/e)
Cross-multiplying, we have:
ax/e = bd/c
Now we solve for x by multiplying both sides by e/a:
x = bde / ac
Answer: A
