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
We can let n = the total number of garments; thus:
2n/3 = 20
2n = 60
n = 30
90% of the 30 garments is 30 * 0.9 = 27. Thus, 27 - 18 = 9 more garments must pass the inspection to hit a 90% pass ratio.
Answer: B
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