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# Isaac can purchase a certain item in four different ways, as

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Manager
Joined: 07 Feb 2010
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Isaac can purchase a certain item in four different ways, as [#permalink]

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09 Nov 2010, 06:35
1
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2
This post was
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Difficulty:

35% (medium)

Question Stats:

71% (01:03) correct 29% (01:05) wrong based on 190 sessions

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1. Internet: \$80, with no sales tax, plus \$10 shipping fee
2. Store X: \$90, a 10% discount, plus 10% tax on discounted price
3. Store Y: \$90, no tax
4. Store Z: \$90, a 10% sales tax, and \$10 rebate after tax

Isaac can purchase a certain item in four different ways, as shown in the table. What is the lowest price for which he can purchase this item?

A. 88.10
B. 89.00
C. 89.10
D. 89.50
E. 90.00
[Reveal] Spoiler: OA

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Document1.pdf [69.47 KiB]

Kudos [?]: 741 [1], given: 101

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Joined: 02 Sep 2009
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09 Nov 2010, 06:45
1
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Expert's post
1. Internet: \$80, with no sales tax, plus \$10 shipping fee
2. Store X: \$90, a 10% discount, plus 10% tax on discounted price
3. Store Y: \$90, no tax
4. Store Z: \$90, a 10% sales tax, and \$10 rebate after tax

Isaac can purchase a certain item in four different ways, as shown in the table. What is the lowest price for which he can purchase this item?

A. 88.10
B. 89.00
C. 89.10
D. 89.50
E. 90.00

1. Internet: \$80, with no sales tax, plus \$10 shipping fee --> 80+10=90;
2. Store X: \$90, a 10% discount, plus 10% tax on discounted price --> 90*0.9*1.1=89.1
3. Store Y: \$90, no tax --> 90;
4. Store Z: \$90, a 10% sales tax, and \$10 rebate after tax --> 90*1.1-10=89.

So the lowest price is \$89.

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Manager
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WE 1: 4.6 years Exp IT prof

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09 Nov 2010, 08:11
An easy question i suppose could have taken max upto a minute to solve
Lowest price comes out to be 89
from Store Z: \$90, a 10% sales tax, and \$10 rebate after tax
which is 10% of 90 = 9 hence price + Sales tax = 90 +9 =99\$
99\$ - 10\$ = 89\$
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Manager
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10 Nov 2010, 05:46
thanks bunuel i didn't study q properly

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29 Mar 2011, 09:00
anilnandyala wrote:
thanks bunuel i didn't study q properly

No, Anil, the issue is not about studying, but about attention... I got trapped by this question just like you did

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29 Mar 2011, 19:20
Option 2 = (90 - 9) + 0.1 * 81

= 81 + 8.1 = 89.10

Option 4 = 90 + 0.1 * 90 - 10

= 89
So the OA is correct - B
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Re: Isaac can purchase a certain item in four different ways, as [#permalink]

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13 Oct 2017, 23:39
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: Isaac can purchase a certain item in four different ways, as   [#permalink] 13 Oct 2017, 23:39
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