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06 Mar 2016, 07:45
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
57% (01:39) correct
43%
(01:52)
wrong
based on 331
sessions
History
Date
Time
Result
Not Attempted Yet
If x persons take y days to complete z similar jobs, how long does it take y persons to complete 1 such job?
A. z
B. x
C. x/y
D. z/x
E. x/z
A. z
B. x
C. x/y
D. z/x
E. x/z
06 Mar 2016, 07:58
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vinoo7
hi,
the Q doesn't seem to be having the any correct answer as a choice..
since we are looking for days, lets keep days in end and work out a solution..
x person can do z jobs in y days..
so x person can do 1 job in y/z days..
and 1 person can do 1 job in y^2/z days..
so y person can complete 1 job in y^2/zy=y/z..
so the answer should be y/z
MorningRunner
Joined: 22 May 2014
Last visit: 26 Nov 2017
Posts: 43
Given Kudos: 286
Status:Manager to Damager!
Affiliations: MBA
Location: United States
Schools: Insead July'17
09 Nov 2016, 08:06
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chetan2u
I didn’t understand the logic in the red coloured line.. Could you please help in understanding the same?
Alternatively,
I solved as follows..
X people * Y days ----> produce Z jobs ----- (1)
Now,
Y people * X days -----> must produce Z jobs ----- (2)
>>>> Hence, to produce 1 job, divide above equation (2) by Z.
Y people *(X/Z) days -----> 1 job
The answer should be X/Z.
I think original answer choice E posted in the question before editing was correct.. If I am wrong can anyone please point out what is wrong in my thinking?
