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A certain recipe calls for 2 cups of sugar and 3 1/2 cups of

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by BTGmoderatorLU » Mon Nov 26, 2018 2:45 pm

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Difficulty—

Source: Princeton Review

A certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour. What is the ratio of flour in this recipe?

A. 3/10
B. 2/5
C. 4/7
D. 4/5
E. 6/7

The OA is C
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by Brent@GMATPrepNow » Mon Nov 26, 2018 4:07 pm
Judging from the OA, I've added some key text below
BTGmoderatorLU wrote:
A certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour. What is the ratio of sugar to flour in this recipe?

A. 3/10
B. 2/5
C. 4/7
D. 4/5
E. 6/7

The OA is C
A certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour
So sugar/flour = 2/3.5
Check answer choices . . . . not there.

Looks like we need to create a ratio that's EQUIVALENT to 2/3.5
Multiply top and bottom by 2 to get the EQUIVALENT ratio of 4/7
Check answer choices . . . . the answer is C

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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by [email protected] » Mon Nov 26, 2018 7:10 pm
Hi All,

We're told that a certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour. We're asked for the ratio of sugar to flour in this recipe. This question can be solved in a couple of different ways. The answer choices are sufficiently 'spread out' that we can actually answer this question with a little math and some logic.

IF... the ratio was 2 cups sugar to 4 cups flour, then the ratio would be 1:2
However, it's NOT 4 cups of flour - it's a bit less (3.5 cups), thus the ratio is a little bit bigger than 1/2 (remember: ratios increase if the first number gets bigger OR the second number gets smaller). There's only one answer that's a LITTLE more than 1/2 (two of the answers are a LOT bigger than 1/2)...

Final Answer: C

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Rich
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by Scott@TargetTestPrep » Wed Mar 27, 2019 6:08 pm
BTGmoderatorLU wrote:Source: Princeton Review

A certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour. What is the ratio of flour in this recipe?

A. 3/10
B. 2/5
C. 4/7
D. 4/5
E. 6/7

The OA is C
2/(3.5) = 4/7

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

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