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Paul has twenty-five transit cards, each worth either..

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Joined: 16 Mar 2011
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Kudos [?]: 29 [0], given: 13

Paul has twenty-five transit cards, each worth either.. [#permalink]  10 Apr 2011, 02:55
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Paul has twenty-five transit cards, each worth either$5,$3, or $1.50. What is the total monetary value of all of Paul's transit cards? Answer: values of cards: 5x + 3y + 1.50(25 - x - y) = ? Simplify ~ 3.5x + 1.5y + 37.5 = ? From here I tried solving for x and y.. Here's what I did, please do correct me if I'm wrong (most probably am ) y = (-37,5 - 3,5x)/1,5 so, 3,5x + 1,5(-37,5 - 3,5x)/1,5 + 37,5 = 3,5x + -37,5 - 3,5x + 37,5 = x = 0 And then I got stuck SVP Joined: 16 Nov 2010 Posts: 1687 Location: United States (IN) Concentration: Strategy, Technology Followers: 31 Kudos [?]: 340 [0], given: 36 Re: Paul has twenty-five transit cards, each worth either.. [#permalink] 10 Apr 2011, 03:19 Hi I think we need more information. This example is present there just to illustrate how to frame/imbibe maximum information from question even before reading the DS choices. "All of the work so far has come just from the prompt of a Data Sufficiency question—you have not even seen statements (1) and (2) yet! But this work is worth the time and energy. In general, you should rephrase and interpret a Data Sufficiency question prompt as much as you can before you begin to work with the statements." Btw, I have not gone beyond this text to read any other information, so please feel free to dig further. Others, please opine. Regards, Subhash _________________ Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant) GMAT Club Premium Membership - big benefits and savings Manager Joined: 16 Mar 2011 Posts: 177 Followers: 1 Kudos [?]: 29 [0], given: 13 Re: Paul has twenty-five transit cards, each worth either.. [#permalink] 10 Apr 2011, 03:21 Hi, yeah so at first I thought that I can't solve it because I got 2 variables and 1 equation but then my friend (who is a math genius) said that it could be solved so I tried doing so and ended up being more confused.. SVP Joined: 16 Nov 2010 Posts: 1687 Location: United States (IN) Concentration: Strategy, Technology Followers: 31 Kudos [?]: 340 [0], given: 36 Re: Paul has twenty-five transit cards, each worth either.. [#permalink] 10 Apr 2011, 03:23 Oh yeah, let us wait to hear from Gurus as Walker, Ian, fluke etc. _________________ Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant) GMAT Club Premium Membership - big benefits and savings Re: Paul has twenty-five transit cards, each worth either.. [#permalink] 10 Apr 2011, 03:23 Similar topics Replies Last post Similar Topics: 3 In blackjack, each card is worth a certain amount of points. 3 30 Apr 2013, 20:37 9 Max has$125 consisting of bills each worth either $5 or$20 8 08 Oct 2012, 01:53
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