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# Some of 50%-intensity red paint is replaced with 25%

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VP
Joined: 07 Dec 2014
Posts: 1128
Some of 50%-intensity red paint is replaced with 25%  [#permalink]

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11 Nov 2015, 18:49
x=fraction of solution replaced
.5-.5x+.25x=.3
x=4/5
Manager
Joined: 05 Jul 2015
Posts: 101
GMAT 1: 600 Q33 V40
GPA: 3.3
Re: Some of 50%-intensity red paint is replaced with 25%  [#permalink]

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19 Nov 2015, 15:21
My way was so quick that I had to triple check to make sure I didn't fall for a trick.

50-----30-------25
---20------5-----

20/25 = 4/5
Non-Human User
Joined: 09 Sep 2013
Posts: 9129
Re: Some of 50%-intensity red paint is replaced with 25%  [#permalink]

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01 Jul 2018, 19:55
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Some of 50%-intensity red paint is replaced with 25% &nbs [#permalink] 01 Jul 2018, 19:55

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