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05 Aug 2016, 05:29
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:
5%
(low)
Question Stats:
84% (00:46) correct
16%
(01:31)
wrong
based on 179
sessions
History
Date
Time
Result
Not Attempted Yet
If C = 5r/(2s) and s ≠ 0, what is the value of C?
(1) r = 4s
(2) r = 2/5
(1) r = 4s
(2) r = 2/5
05 Aug 2016, 06:50
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Bunuel
Stat 1: r = 4s. Sub this in C = 5r/(2s) => 5(4s)/2s = 10....Sufficient.
Stat 2: C = 5(2)/(2s)(5) => 1/s.. we are not sure about s value..Insufficient..
IMO option A is correct answer
OA please..will correct if I missed anything..
05 Aug 2016, 07:10
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Bunuel
Target question: What is the value of C?
Given: C = 5r/(2s) and s ≠ 0
Statement 1: r = 4s
Given: C = 5r/(2s)
Replace r with 4s to get: C = 5(4s)/(2s) = 20s/2s = 10
So, C = 10
Since we can answer the target question with certainty, statement 1 is SUFFICIENT
Statement 2: r = 2/5
Given: C = 5r/(2s)
Replace r with 2/5 to get: C = 5(2/5)/(2s) = 2/(2s) = 1/s
As we can see, even with the extra information (r = 2/5), the value of C still depends on the value of s
As such, we can't determine the value of C
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT
Answer =
Cheers,
Brent
