A machine that produces bottles from plastic has an average : PS Archive
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# A machine that produces bottles from plastic has an average

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Manager
Joined: 05 Jun 2006
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A machine that produces bottles from plastic has an average [#permalink]

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06 Jun 2006, 14:32
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A machine that produces bottles from plastic has an average discard percentage equal to 20% of the loaded plastic. Every finished bottle contains 100 grams of plastic. How many grams of plastic are averagely needed to produce 10 bottles?
A) 1000
B) 1150
C) 1200
D) 1250
E) 1400
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06 Jun 2006, 15:29
haas_mba07 wrote:
C). 100gms x 10 x 1.2 = 1200gms

robbie1981 wrote:
A machine that produces bottles from plastic has an average discard percentage equal to 20% of the loaded plastic. Every finished bottle contains 100 grams of plastic. How many grams of plastic are averagely needed to produce 10 bottles?
A) 1000
B) 1150
C) 1200
D) 1250
E) 1400

No, it is not C. If you load 1200 grams the machine discards: 20%x1200gms= 240 gms. The remaining 960 gms are not enough to produce 10 bottles.
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06 Jun 2006, 15:40
Agree with gmatmba

x(.80)=100 --> x=125 (25g are discard/bottle)

=10(25+100)=1250
VP
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06 Jun 2006, 16:16
And that is why I should study more!! Moral : Pay attention if it looks too easy!!
Thanks guys!

robbie1981 wrote:
haas_mba07 wrote:
C). 100gms x 10 x 1.2 = 1200gms

robbie1981 wrote:
A machine that produces bottles from plastic has an average discard percentage equal to 20% of the loaded plastic. Every finished bottle contains 100 grams of plastic. How many grams of plastic are averagely needed to produce 10 bottles?
A) 1000
B) 1150
C) 1200
D) 1250
E) 1400

No, it is not C. If you load 1200 grams the machine discards: 20%x1200gms= 240 gms. The remaining 960 gms are not enough to produce 10 bottles.
Re: PS: Bottles   [#permalink] 06 Jun 2006, 16:16
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