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QOTD#28 A jar contains only marbles of three different color

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GMAT Club Legend
GMAT Club Legend
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Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1664 [0], given: 396

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QOTD#28 A jar contains only marbles of three different color [#permalink] New post 31 May 2017, 06:29
Expert's post
00:00

Question Stats:

66% (01:04) correct 33% (00:37) wrong based on 3 sessions
A jar contains only marbles of three different colors: red, green, and yellow. The red and green marbles are in a ratio of 2:5, and the yellow and red marbles are in a ratio of 5:6. Which of the following could be the total number of marbles?

Indicate all the options

A. 13
B. 24
C. 52
D. 90
E. 134
F. 182

Drill 2
Question: 5
Page: 341
[Reveal] Spoiler: OA

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Sandy
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GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1664 [0], given: 396

CAT Tests
Re: QOTD#28 A jar contains only marbles of three different color [#permalink] New post 04 Jun 2017, 15:29
Expert's post
Explanation

Since red is common to the given ratios, you’ll want to multiply the red:green ratio by 3 so that red is 6 in both. Now you can put it all together in one ratio—red:green:yellow = 6:15:5.

More importantly, you can put them in one Ratio Box:

Attachment:
DI Upload.jpg
DI Upload.jpg [ 10.92 KiB | Viewed 873 times ]


No need to finish the rest of the Ratio Box—you have all you need. Look for answer choices that are multiples of 26. Only choices C and F work.
_________________

Sandy
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Re: QOTD#28 A jar contains only marbles of three different color   [#permalink] 04 Jun 2017, 15:29
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QOTD#28 A jar contains only marbles of three different color

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