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The main ingredient in a certain prescription drug capsule

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Manager
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The main ingredient in a certain prescription drug capsule [#permalink] New post 27 May 2006, 08:09
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88% (01:54) correct 13% (00:00) wrong based on 22 sessions
The main ingredient in a certain prescription drug capsule costs $500/kilogram. If each capsule contains 600 miligrams of the main ingredient, what is the cost of the ingredient in the capsule? (1 kil=10^6 milligrams)

.30
.83
1.20
3.00
3.33

Can you explain? It seemed pretty easy to me, but I got it wrong, so I must have made a calculation error....Thanks!
Manager
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 [#permalink] New post 27 May 2006, 08:35
You are right...

How did you get that? for some reason, I got 0.83...
Manager
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 [#permalink] New post 27 May 2006, 08:38
kuristar wrote:
You are right...

How did you get that? for some reason, I got 0.83...


kilograms of substance in one capsule = 600/10^6

Cost of substance in one capsule = 500* (600/10^6)
Manager
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 [#permalink] New post 27 May 2006, 08:54
Gotcha. Thank you, I think I divided by 500 instead of multiplying.
SVP
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 [#permalink] New post 31 May 2006, 01:16
Easy one.

1kg cost $500
10^6 mg cost $500
600mg cost 500*600/10^6 = 0.30
Director
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GMAT prep question [#permalink] New post 21 Oct 2006, 09:59
The main ingredient in a certain prescription drug capsule costs $500.00 per kilogram. If each capsule contains 600 milligrams of this ingredient, what is the cost of the ingredient in a capsule? (1 kilogram = 10^6 milligrams)

$.30
$.83
$1.20
$3.00
$3.33
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 [#permalink] New post 21 Oct 2006, 11:17
The main ingredient in a certain prescription drug capsule costs $500.00 per kilogram. If each capsule contains 600 milligrams of this ingredient, what is the cost of the ingredient in a capsule? (1 kilogram = 10^6 milligrams)

$.30 $.83 $1.20 $3.00 $3.33

what is the cost of 600 milligrams given cost of one killogram is 500

10^6 / 600 = 1/6 *10^4 = number of capsules in one killogram

500 / (1/6 *10^4) = 30 * 10^-2 = 3/10 = 0.3
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Senior Manager
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 [#permalink] New post 21 Oct 2006, 12:42
1
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KUDOS
The main ingredient in a certain prescription drug capsule costs $500.00 per kilogram. If each capsule contains 600 milligrams of this ingredient, what is the cost of the ingredient in a capsule? (1 kilogram = 10^6 milligrams)

$.30
$.83
$1.20
$3.00
$3.33

10^6 / 10^3 = 1000mg
500/10^3 = 500/1000 = 0.5

can stop here, we know 1000mg = 0.5$
so must be A

or we can work the rest out :-D 6/10 * 0.5 = $0.3
Senior Manager
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Re: GMAT prep question [#permalink] New post 29 Aug 2011, 05:27
Find the cost per mg, and multiply that by 600mg…

1kg = 1*10^6 mg. Cost per kg = $500. Therefore cost per mg = $500/10^6 = $5/10^4 .

Multiply this by 600 to get cost per 600mg = (5/10^4)*(6*10^2) = 30*10^-2 = 0.3
Re: GMAT prep question   [#permalink] 29 Aug 2011, 05:27
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