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ratio problem

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ratio problem [#permalink] New post 26 Feb 2009, 21:30
I'm not understanding the question....what does it mean "the shipments combined?"

Thanks in advance!
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Re: ratio problem [#permalink] New post 26 Feb 2009, 22:33
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keeshafey wrote:
I'm not understanding the question....what does it mean "the shipments combined?"

Thanks in advance!


It means on future shipment ( Defective chips)/ ( Total no of chips) = S1=S2=S3=S4.

so x/60,000 = 2/5000 = 5/12000 = 6/18,000= 4/16,000.

Solve for X and you will get x=20.

Hope so you got it.
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Re: ratio problem [#permalink] New post 26 Feb 2009, 22:34
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Hi keeshafey,


What it's trying to say is that in future shipments,

(The number of defective chips) / (Total chips) = {Defective chips (S1 + S2 + S3+ S4)} / {Total Chips (S1 + S2 + S3+ S4)}

R.H.S = (2+5+6+4)/(5000 + 12000 + 18000 + 16000)
= 17/51000

On L.H.S side, you are given that (Total chips) = 60000

Therefore, (The number of defective chips) = 20


Regards,
Technext
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Re: ratio problem   [#permalink] 26 Feb 2009, 22:34
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