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A certain mixture of nuts consists of 5 parts almonds to 2 parts walnu

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A certain mixture of nuts consists of 5 parts almonds to 2 parts walnu  [#permalink]

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New post 23 Nov 2015, 13:09
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A
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E

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Question Stats:

96% (00:44) correct 4% (01:11) wrong based on 69 sessions

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Re: A certain mixture of nuts consists of 5 parts almonds to 2 parts walnu  [#permalink]

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New post 23 Nov 2015, 19:53
Bunuel wrote:
A certain mixture of nuts consists of 5 parts almonds to 2 parts walnuts, by weight. What is the number of pounds of almonds in 140 pounds of the mixture ?

(A) 100
(B) 84
(C) 40
(D) 28
(E) 20


Almonds : Walnuts = 5 : 2
Total mixture has 7 parts
In a 140 pound mixture, Almonds are 5/7 (total mixture)
= 5/7 * 140 = 100 pounds

Answer (A)
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Re: A certain mixture of nuts consists of 5 parts almonds to 2 parts walnu  [#permalink]

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New post 25 Nov 2015, 10:23
Hi All,

Ratio questions can be solved in a variety of different ways, depending on how you choose to do the math. You can use multiples, part-to-part, part-to-whole or a number of other math 'steps' to get to the correct answer to this question.

We're told that a nut mixture is 5 parts almonds to 2 parts walnuts. That means there are 5+2 = 7 total parts to the mixture (and in typical GMAT questions, the total mixture would be some multiple of 7 pounds). Here, we're told that the total is 140 pounds, which makes the next set of steps really easy:

140 pound/7 parts = 20 pounds per part

This means that there are 5(20) = 100 pounds of almonds and 2(20) = 40 pounds of walnuts. You'll notice that BOTH of those answers appear among the 5 choices, so you have to make sure that you're answering the question that is ASKED. In this case, we want the total almonds in the mixture.

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Re: A certain mixture of nuts consists of 5 parts almonds to 2 parts walnu   [#permalink] 25 Nov 2015, 10:23
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