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Director
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At a certain store, each notepad costs x dollars and each [#permalink]
 15 Apr 2008, 00:29
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At a certain store, each notepad costs x dollars and each marker costs y dollars. if $10 is enough to buy 5 notepads and 3 markers, is $10 enough to buy 4 notepads and 4 markers instead?
(1) each notepad costs less than $1.
(2) $10 is enough to buy 11 notepads.
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CEO
Joined: 17 Nov 2007
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E1 and 2 conditions state the same: each notepad costs less than $1 A) Let a notepad costs 0.00001$ and a marker costs 0.00001$. It this case we can buy 4 notepads and 4 markers instead. B) Let a notepad costs 0.00001$ and a marker costs 9.9/3=3.3$. It this case we cannot buy 4 notepads and 4 markers instead.
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Current Student
Joined: 27 Mar 2008
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I would think the answer is E.
You are given: 10 > 5N + 3M
The question is: 10>= 4N + 4M
A:
Assume N = $0.90, max (M) = 5.5/3 = $1.83
4N + 4M = 3.6+ 7.3 which is greater than 10
N = 1, M = 1
4N + 4M = 8 which is less than 10
Insuff
B: Similar to A. max(n) = $0.91
This will also produce values greater than or less than 10.
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SVP
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so where am i going wrong here ; im getting C
I rephrase the question to mean that 5x+3y<=10, and question asks if 4x+4y<=10, i.e. is x+y<=2.50 ?
statement 1 tells me just that y<=1, no info about other price, so insuff.
statement 2 tells me that x<=0.91, no info about other price, so insuff.
together, the max price for x+y is 0.91 and 0.99, which sums to 1.90, and that is less than 2.5. so it should be sufficient
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Current Student
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Both statement 1 and statement 2 tell you about the max price of x (notebook).
Neither one of them gives any indication around the max price for y (marker). As a result, even when you use both statements together, you cannot determine the max price for the marker. That's where you are making a mistake.
If the marker is $1, then it true. If the marker is $1.83 as I showed in my example, then false.
So, answer is E.
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Manager
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answer e
if $10 is enough to buy 5 notepads and 3 markers - means that it can be anything less than 10 (is this interpretation right)
Can anyone confirm this interpretation?
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Director
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You can assume that you spent $0 on notepads and $0 on markers. And yet the premises are not invalidated  . Big yes to your interpretation ! gmatprep2011 wrote: answer e
if $10 is enough to buy 5 notepads and 3 markers - means that it can be anything less than 10 (is this interpretation right)
Can anyone confirm this interpretation?
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close
