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06 Jan 2020, 07:10
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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:
45%
(medium)
Question Stats:
69% (02:33) correct
31%
(02:11)
wrong
based on 209
sessions
History
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Not Attempted Yet
The ratio of blue collar workers to white collar workers at Company K is the same as the ratio of blue collar workers to white collar workers at Company G. What is the ratio of the number of blue collar workers at Company K to the number of blue collar workers at Company G ?
(1) If a worker is chosen at random from Company K, then the probability that a blue collar worker is chosen is 80%.
(2) There are 1000 fewer blue collar workers at Company K than there are blue collar workers at Company G.
Are You Up For the Challenge: 700 Level Questions
(1) If a worker is chosen at random from Company K, then the probability that a blue collar worker is chosen is 80%.
(2) There are 1000 fewer blue collar workers at Company K than there are blue collar workers at Company G.
Are You Up For the Challenge: 700 Level Questions
06 Jan 2020, 22:55
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Bunuel
let Bk and Wk be the blue collar and white collar workers at company K
Bg,Wg be the blue collar,white collar workers at company G
it is given that
(Bk/Wk)=(Bg/Wg)
Now consider statement 1:
given that
Bk/(Bk+Wk)=80/100
=> Bk/Wk=4/1
Bk=4a,Wk=a
=>Bg/Wg=4/1
Bg=4x,Wg=x
Bk/Bg=4a/4x=a/x (no unique answer)
Now consider statement 2:
given
Bk=Bg-1000
we get multiple answers
statement 2 alone is not suficient
Now consider both the statements together:
we got Bk=4a,Bg=4x
substituting we get
4x-4a=1000
x-a=250
no unique answer
hence choice E
Archit3110
Major Poster
11 Jan 2020, 02:05
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need to determine
Bk/Bg
given Company K = Bk/Wk = Company G; BG/Wg
If a worker is chosen at random from Company K, then the probability that a blue collar worker is chosen is 80%.
so Bk = 80 of 100 or 800 of 1000
insufficient as no relation with Company G know
#2
There are 1000 fewer blue collar workers at Company K than there are blue collar workers at Company G
Bk = Bg-1000
Bg not know
from 1 &2
Bk = 80 , 800
so BG = 1080, 1800
ratio ;
Bk/Bg = will vary no unique value
IMO E
Bk/Bg
given Company K = Bk/Wk = Company G; BG/Wg
If a worker is chosen at random from Company K, then the probability that a blue collar worker is chosen is 80%.
so Bk = 80 of 100 or 800 of 1000
insufficient as no relation with Company G know
#2
There are 1000 fewer blue collar workers at Company K than there are blue collar workers at Company G
Bk = Bg-1000
Bg not know
from 1 &2
Bk = 80 , 800
so BG = 1080, 1800
ratio ;
Bk/Bg = will vary no unique value
IMO E
Bunuel
