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From May 1, 1960, to May 1, 1975, the closing price of a

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From May 1, 1960, to May 1, 1975, the closing price of a [#permalink] New post 17 Jan 2006, 17:52
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E

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81% (01:44) correct 19% (00:26) wrong based on 72 sessions
From May 1, 1960, to May 1, 1975, the closing price of a share of stock X doubled. What was the closing price of a share of stock X on May 1, 1960?

(1) From May 1, 1975 to May 1, 1984, the closing price of a share of stock X doubled.
(2) From May 1, 1975 to May 1, 1984, the closing price of a share of stock X increased by $4.50
[Reveal] Spoiler: OA

Last edited by Bunuel on 30 Jan 2013, 03:57, edited 1 time in total.
Edited the question and added OA.
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 [#permalink] New post 17 Jan 2006, 18:00
C.

Let closing price in 1960 be x.

I..Insuff. All we know is that price in 60,75,84 is x,2x,4x.
II. Insuff. All we know is that price in 84 is 2x + 4.50.

I + II, gives 4x = 2x + 4.50...SUFF.
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 [#permalink] New post 17 Jan 2006, 22:03
C it is
a) Insuuff we only know x, 2x,4x
b) we only know that 2x+4.5
combine and we know that 4x=2x+4.5
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 [#permalink] New post 18 Jan 2006, 00:11
1960 x
1975 2x
1985 Y

what is x

1) Y= 2*2x does not answer x
2) Y -2x = 4.5 can not solve for x

but with 1 and 2 to gather

4x = 4.5 +2x

Both togather are sufficient!
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 [#permalink] New post 18 Jan 2006, 01:23
1960 = x
1975 = 2x
1984 = y

St1: y = 4x. Can not find out x. So INSUFF

St2: y = 2x+4.5. Can not find out x. So INSUFF

Combined: two variables and two equations. Solve for x

4x = 2x + 4.5
x = 2.25
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Re: From May 1, 1960, to May 1, 1975, the closing price of a [#permalink] New post 30 Jan 2013, 03:47
so the translation of the second statement is x+x+4.5?
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Re: From May 1, 1960, to May 1, 1975, the closing price of a [#permalink] New post 30 Jan 2013, 04:02
Expert's post
fozzzy wrote:
From May 1, 1960, to May 1, 1975, the closing price of a share of stock X doubled. What was the closing price of a share of stock X on May 1, 1960?

(1) From May 1, 1975 to May 1, 1984, the closing price of a share of stock X doubled.
(2) From May 1, 1975 to May 1, 1984, the closing price of a share of stock X increased by $4.50

so the translation of the second statement is x+x+4.5?


Yes. If we assume that the price in 1960 was $x, then the price in 1975 would be $2x. From (2) the price in 1984 was 2x+4.5.
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Re: From May 1, 1960, to May 1, 1975, the closing price of a [#permalink] New post 12 Sep 2013, 07:23
Is it a 600 question ?
Re: From May 1, 1960, to May 1, 1975, the closing price of a   [#permalink] 12 Sep 2013, 07:23
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