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avohden
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(7.25-1.25)/... Updated on: 14 Feb 2019, 16:55
Originally posted by avohden on 02 Oct 2013, 16:23.
Last edited by bb on 14 Feb 2019, 16:55, edited 1 time in total.
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

15% (low)

Question Stats:

93% (01:15) correct 7% (01:34) wrong based on 56 sessions

History

Date
Time
Result
Not Attempted Yet
[IMAGE with Question is MISSING :( ]

A. 0.75
B 1.5
C. 2.25
D. 3
E. 3.75

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C
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(7.25-1.25)/... 02 Oct 2013, 16:32
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Official Explanation

Let's take this problem one fraction at a time. Looking at the first fraction, you we can easily simplify the numerator: 7.25 – 1.25 = 6. In the denominator,. So , and the first fraction is equal to 0.75 (written as a decimal). Now take the second fraction. In the numerator, .In the denominator, (3)(4) = 12. So , and the second fraction is also equal to 0.75. Looking at the third fraction, remember that . So this fraction also equals , or 0.75. Adding, 0.75 + 0.75 + 0.75 = 2.25, and the correct answer is thus choice (C).
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(7.25-1.25)/... 02 Oct 2013, 20:34
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Option C. The provided explanation is correct; Each term simplifies to 3/4 or 0.75 & 3 times 0.75 gives us 2.25 --> Option C
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(7.25-1.25)/... 28 Oct 2014, 01:23
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Simplifying:

\(\frac{3}{4} + \frac{3}{4} + \frac{3}{4} = \frac{9}{4} = \frac{225}{100} = 2.25\)

Answer = C
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(7.25-1.25)/... 29 Oct 2014, 14:19
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Just wondering how you guys assumed the square root of the numbers are only positive? Isn't it possible to have a combination of negative roots as well? Thanks!
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Ashishmathew01081987
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(7.25-1.25)/... 29 Oct 2014, 22:06
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gmatchess
Just wondering how you guys assumed the square root of the numbers are only positive? Isn't it possible to have a combination of negative roots as well? Thanks!
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As far as GMAT is concerned

Root of a "Number" is always +ve i.e. \sqrt{9} = 3

However, \sqrt{X^2} = Mod X = +/- X
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(7.25-1.25)/... 30 Oct 2014, 02:57
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gmatchess
Just wondering how you guys assumed the square root of the numbers are only positive? Isn't it possible to have a combination of negative roots as well? Thanks!
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When the GMAT provides the square root sign for an even root, such as a square root, fourth root, etc. then the only accepted answer is the positive root.

That is:
\(\sqrt{9} = 3\), NOT +3 or -3;
\(\sqrt[4]{16} = 2\), NOT +2 or -2;

Notice that in contrast, the equation \(x^2 = 9\) has TWO solutions, +3 and -3. Because \(x^2 = 9\) means that \(x =-\sqrt{9}=-3\) or \(x=\sqrt{9}=3\).

Hope it's clear.
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(7.25-1.25)/... 09 Feb 2019, 00:12
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avohden


A. 0.75
B 1.5
C. 2.25
D. 3
E. 3.75
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Dear Moderator,
The image in this question is not visible.Hope you will do the needful.Thank you.

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Bunuel
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