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07 Sep 2017, 23:59
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
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Question Stats:
62% (01:45) correct
38%
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wrong
based on 80
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Luckisnoexcuse
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Joined: 18 Aug 2016
Last visit: 16 Apr 2022
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Own Kudos:
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Concentration: Strategy, Technology
Schools: Kenan-Flagler '20 (M)
GMAT 1: 630 Q47 V29
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08 Sep 2017, 00:20
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Bunuel
If js – k = m, what is s?
(1) ms = k
(2) j/m = 4
(1) ms = k
(2) j/m = 4
(1) ms=k
no info abt j..not suff
(2) no inf abt k..not suff
on combining
(j/m)*s - (k/m) = 1
4s-s=1
3s = 1
s=1/3
Suff
C
08 Sep 2017, 00:51
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Rewriting the equation,
\(js = m + k\)
\(js - m = k\)
\(js^2 - ms = ks\)
1. \(ms = k\)
But only knowing value of ms is not enough(Insufficient)
2.\(\frac{j}{m} = 4\)
\(j = 4m\)
Knowing only the value of j is not enough (Insufficient)
We know that \(js^2 - ks = ms\)
On combining the information and substituting the values,
\(4m*s^2 - ms^2 = ms\)
\(3m*s^2 = ms\)
\(s = \frac{1}{3}\) (Sufficient) (Option C)
\(js = m + k\)
\(js - m = k\)
\(js^2 - ms = ks\)
1. \(ms = k\)
But only knowing value of ms is not enough(Insufficient)
2.\(\frac{j}{m} = 4\)
\(j = 4m\)
Knowing only the value of j is not enough (Insufficient)
We know that \(js^2 - ks = ms\)
On combining the information and substituting the values,
\(4m*s^2 - ms^2 = ms\)
\(3m*s^2 = ms\)
\(s = \frac{1}{3}\) (Sufficient) (Option C)
