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# At the bakery, Lew spent a total of $6.00 for one kind of  post reply Question banks Downloads My Bookmarks Reviews Important topics Author Message Senior Manager Joined: 30 Nov 2008 Posts: 489 Schools: Fuqua Followers: 10 Kudos [?]: 290 [0], given: 15 At the bakery, Lew spent a total of$6.00 for one kind of [#permalink]

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11 Oct 2009, 23:30
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At the bakery, Lew spent a total of $6.00 for one kind of cupcake and one kind of doughnut. How many doughnuts did he buy? 1) The price of 2 doughnuts was$0.10 less than the price of 3 cupcakes.
2) The average price of 1 doughnut and 1 cupcake was $0.35. SVP Joined: 29 Aug 2007 Posts: 2476 Followers: 70 Kudos [?]: 774 [0], given: 19 Re: Cupcake and Doughnut [#permalink] ### Show Tags 12 Oct 2009, 00:04 mrsmarthi wrote: At the bakery, Lew spent a total of$6.00 for one kind of cupcake and one kind of doughnut. How many doughnuts did he buy?

1) The price of 2 doughnuts was $0.10 less than the price of 3 cupcakes. 2) The average price of 1 doughnut and 1 cupcake was$0.35.

E. From i and ii: price of a doughnut = 0.40 and price of a cupcake = 0.30

nd + mp = 6
n = number of doughnuts
m = number of cupcack

1: 3p - 2d = 0.1 .............i
2: p + d = 2 (0.35) .....................ii

From i and ii: d = 0.40 and p = 0.30

If n = 0, m = 15.
If n = 4, m = 12.
....................
....................
If n = 20, m = 0

E..
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Senior Manager
Joined: 30 Nov 2008
Posts: 489
Schools: Fuqua
Followers: 10

Kudos [?]: 290 [0], given: 15

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12 Oct 2009, 00:14
Yes it is.......E

Hum...again a careless mistake - miscalculation from my side.
Intern
Joined: 03 Oct 2009
Posts: 38
Schools: NY Stern; Columbia; Cornell; Waterloo; U of T
Followers: 0

Kudos [?]: 7 [0], given: 8

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12 Oct 2009, 18:56
Hi GMAT TIGER ,

Thanks for the explanation. I understood your calculation and logic behind 'E'.

However, I also came to the same conclusion. But for diffrent reasons. Please help me to understand whether I am wrong.

I assumed that there could be a burgain price for buying more than 1 of either of the items. So, when I buy one Doughnut or 1 Cupcake, the price charged could be more than a burgain price.

Thus, from both statements together I won't be able to answer the Q.

My Q to you is "Is my assumtion valid?" ---> For this Q or any similar Q?

SVP
Joined: 29 Aug 2007
Posts: 2476
Followers: 70

Kudos [?]: 774 [0], given: 19

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12 Oct 2009, 22:00
Syed wrote:
Hi GMAT TIGER ,

Thanks for the explanation. I understood your calculation and logic behind 'E'.

However, I also came to the same conclusion. But for diffrent reasons. Please help me to understand whether I am wrong.

I assumed that there could be a burgain price for buying more than 1 of either of the items. So, when I buy one Doughnut or 1 Cupcake, the price charged could be more than a burgain price.

Thus, from both statements together I won't be able to answer the Q.

My Q to you is "Is my assumtion valid?" ---> For this Q or any similar Q?

Nope. You cannot go beyond the question and info provided. Your assumption do not have any effect on the answer because the answer is E. If it were other than E, your assumption would have altered the answer. In that case, you would be trapped to wrong answer. Your answer must be based only on the info provided..
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Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html

GT

Intern
Joined: 03 Oct 2009
Posts: 38
Schools: NY Stern; Columbia; Cornell; Waterloo; U of T
Followers: 0

Kudos [?]: 7 [0], given: 8

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13 Oct 2009, 05:43
Thanks for the clarification Tiger..
Re: Cupcake and Doughnut   [#permalink] 13 Oct 2009, 05:43
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