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12 May 2021, 06:00
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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:
85%
(hard)
Question Stats:
42% (01:50) correct
58%
(01:35)
wrong
based on 194
sessions
History
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Time
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Not Attempted Yet
If Guy works at a constant rate, how many minutes would it take him to complete 15X^2 phone calls?
(1) Guy takes X minutes to complete each phone call.
(2) Every minute, Guy completes X phone calls.
(1) Guy takes X minutes to complete each phone call.
(2) Every minute, Guy completes X phone calls.
15 May 2021, 16:06
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Bunuel
Statement 1:
Guy's rate is \(\frac{1}{X}\) phones calls per minute. Insufficient.
Statement 2:
Guy's rate is \(X\) phone calls per minute. Insufficient.
Combined:
We have \(\frac{1}{X} = X\) and \(X^2 = 1\). Sufficient.
Ans: C
andrenoble
Joined: 06 Aug 2021
Last visit: 04 Nov 2023
Posts: 60
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Given Kudos: 75
Location: United Kingdom
Schools: LBS '26 Imperial Wharton '26 MIT LGO'26
GPA: 3.98
WE:Business Development (Healthcare/Pharmaceuticals)
10 Jun 2023, 06:02
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I think this is a very poorly worded question. One could imply that we need to solve for 'any X', and then either of the (1) and (2) would give sufficient information. In case we need to consider a definite X, then only (1) + (2), since then we find X = 1.
