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When 2/3 of the garments in the shipment were inspected, 18
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20 Mar 2012, 10:33
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84% (01:22) correct
When 2/3 of the garments in the shipment were inspected, 18 of the garments passed inspection and the remaining 2 garments failed. How many of the uninspected garments must pass inspection in order that 90 percent of the garments in the shipment pass?
A. 10
B. 9
C. 8
D. 7
E. 5
A. 10
B. 9
C. 8
D. 7
E. 5
Re: When 2/3 of the garments in the shipment were inspected, 18
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20 Mar 2012, 12:45
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Expert Reply
enigma123 wrote:
When 2/3 of the garments in the shipment were inspected, 18 of the garments passed inspection and the remaining 2 garments failed. How many of the uninspected garments must pass inspection in order that 90 percent of the garments in the shipment pass?
A. 10
B. 9
C. 8
D. 7
E. 5
A. 10
B. 9
C. 8
D. 7
E. 5
We are told that 18+2=20 of the garments inspected compose 2/3 rd of the shipment, hence the shipment consists of 20/(2/3)=30 garments. We want 90% of the garments to pass inspection, so we need 0.9*30=27 of the garments to pass inspection. For now only 18 of the garments passed inspection, thus 27-18=9 of the garments from uninspected 10 must pass inspection.
Answer: B.
General Discussion
Re: When 2/3 of the garments in the shipment were inspected, 18
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23 Mar 2012, 05:13
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B = 9
2/3x= 20
x=30
for 90% approval we need 27 garments approved.
already approved = 18
we need 9 more. hence B.
2/3x= 20
x=30
for 90% approval we need 27 garments approved.
already approved = 18
we need 9 more. hence B.