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Pat bought 5 pounds of apples. How many pounds of

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Pat bought 5 pounds of apples. How many pounds of [#permalink] New post 14 Nov 2012, 05:36
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Pat bought 5 pounds of apples. How many pounds of pears could he have bought for same amount of money?
1) 1 pound of pears cost $0.5 more that 1 pound of apples
2) 1 pound of pears cost 1.5 times as much as 1 pound of apples

[Reveal] Spoiler:
OA B
[Reveal] Spoiler: OA
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Re: Pat bought 5 pounds of apples. How many pounds of [#permalink] New post 14 Nov 2012, 09:48
Pat bought 5 pounds of apples. How many pounds of pears could he have bought for same amount of money?
1) 1 pound of pears cost $0.5 more that 1 pound of apples
2) 1 pound of pears cost 1.5 times as much as 1 pound of apples

We need a relationship between price of pears and that of apples to solve the question.

STAT1
1p = 0.5 + 1a
But this relationship is not sufficient to answer because
price of 5 pounds of apples = 5p = 5*0.5 + 5a but we cannot tell for sure about the exact pounds of apples we can buy

STAT2
1p = 1.5*1a
This relationship is sufficient because
price of 5 pounds of apples = 5p = 5*1.5 *1a= 7.5a
so we know for sure that we can buy 7.5 pounds of apples with the same money.
So, Answer will be B

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Re: Pat bought 5 pounds of apples. How many pounds of [#permalink] New post 04 Jan 2015, 12:26
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Hi All,

In these types of DS questions, if you're sure if a pattern exists or not, you can prove it by TESTing VALUES and being thorough. Here's how:

We're told that Pat bought 5 pounds of apples. We're asked how many pounds of pears could have been purchased with the same amount of money.

**Note: I'm going to assume that both the cost per pound of apples and the cost per pound of pears remains constant.**

Fact 1: 1 pound of pears costs $0.5 more than 1 pound of apples.

IF....
A pound of apples cost $1, then a pound of pears costs $1.50
5 pounds of apples = $5
$5 = $1.50(X pounds of pears)
X = 3 1/3 pounds of pears

IF...
A pound of applies costs $.50, then a pound of pears costs $1
5 pounds of applies = $2.50
$2.50 = $1(X pounds of pears)
X = 2.5 pounds of pears
The answer changes based on the starting price of a pound of applies.
Fact 1 is INSUFFICIENT

Fact 2: 1 pound of pears costs 1.5 times as much as 1 pound of apples

IF...
A pound of applies costs $1, then a pound of pears costs $1.50
5 pounds of applies = $5
$5 = $1.50(X pounds of pears)
X = 3 1/3 pounds of pears

A pound of applies costs $2, then a pound of pears costs $3
5 pounds of applies = $10
$10 = $3(X pounds of pears)
X = 3 1/3 pounds of pears

A pound of applies costs $0.50, then a pound of pears costs $0.75
5 pounds of apples = $2.50
$2.50 = $0.75(X pounds of pears)
X = 3 1/3 pounds of pears

In EVERY situation, we end up with the SAME number of pounds of pears.
Fact 2 is SUFFICIENT

Final Answer:
[Reveal] Spoiler:
B


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Re: Pat bought 5 pounds of apples. How many pounds of   [#permalink] 04 Jan 2015, 12:26
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