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C
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95% (00:51) correct
5%
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A certain bag contains red, blue, and green marbles. What is the ratio of number of green marbles to the number of red marbles in the bag?
(1) The number of blue marbles in the bag is two times the number of green marbles in the bag.
(2) The number of blue marbles in the bag is three times the number of red marbles in the bag.
(1) The number of blue marbles in the bag is two times the number of green marbles in the bag.
(2) The number of blue marbles in the bag is three times the number of red marbles in the bag.
Can anyone help?
Pls do correct me if I am mistaken with the difficulty.
Pls do correct me if I am mistaken with the difficulty.
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ENGRTOMBA2018
Joined: 20 Mar 2014
Last visit: 01 Dec 2021
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Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
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WE:Engineering (Aerospace and Defense)
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03 Mar 2016, 09:44
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tudelue
Please follows posting guidelines (link in my signatures). Do add OA when you start a new question.
As for the question, let B,R,G stand for # of blue, red and green balls respectively.
You are asked for G/R =?
Per statement 1, B=2G , clearly not sufficient. Take 2 cases, R=10, G=10, B=20 ---> G/R=1 but if R=20, G=10, B=20, then G/R=0.5
Per statement 2, B=3R. Again, not sufficient.
Combining, you get, B=3R=2G --> 3R=2G --> G/R=1.5 . Unique value. Hence both statements together are sufficient.
Hope this helps.
03 Mar 2016, 09:50
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tudelue
It is a very simple question.
To know the ratio between A and B , we have to have some information that relates A and B.
Statement 1 talks about blue and green which does nothing to help with red and green ratio.
Statement 2 does the same by providing information only on relation between blue and red.
Combining these two, we have a relation for red:blue:green For example if there are x green marbles in the bag, there will be 2x blue and 2/3x red marbles.
Hence C
