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Larry saves x dollars per month. Will Larry s total savings

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Larry saves x dollars per month. Will Larry s total savings [#permalink]

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06 Oct 2010, 07:10
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35% (medium)

Question Stats:

63% (02:07) correct 37% (01:03) wrong based on 30 sessions

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Larry saves x dollars per month. Will Larry’s total savings one year from now exceed his present savings by at least $500 ? (Assume that there is no interest.) (1) In 6 months Larry's total savings will be$900.
(2) In 3 months Larry's total savings will exceed his present savings by $150. Please explain why statement 1 is not sufficient [Reveal] Spoiler: OA Math Expert Joined: 02 Sep 2009 Posts: 38889 Followers: 7735 Kudos [?]: 106134 [1] , given: 11607 Re: Savings DS [#permalink] Show Tags 06 Oct 2010, 07:36 1 This post received KUDOS Expert's post agnok wrote: Larry saves x dollars per month. Will Larry’s total savings one year from now exceed his present savings by at least$500 ? (Assume that there is no interest.)

(1) In 6 months Larry's total savings will be $900. (2) In 3 months Larry's total savings will exceed his present savings by$150.

Please explain why statement 1 is not sufficient

Let's say Larry's present savings is $$y$$.
Question: is $$12x+y>y+500$$? --> is $$12x>500$$?

(1) $$y+6x=900$$, not sufficient to say whether $$12x>500$$ (or whether $$6x>250$$).
(2) $$y+3x=y+150$$ --> $$x=50$$ --> $$12x=600>500$$. Sufficient.

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Re: Larry saves x dollars per month. Will Larry s total savings [#permalink]

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29 Mar 2017, 05:56
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Re: Larry saves x dollars per month. Will Larry s total savings   [#permalink] 29 Mar 2017, 05:56
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