In a factory that produces computer circuit boards, 4.5 percent of all boards produced are found to be defective and are repaired before being sold, but 10 percent of all defective boards are sold without being repaired. What percentage of boards produced in the factory are defective?
1. 10% of defective boards are not repaired . Therefore 90% of defective boards are repaired
2. 90% of defective boards is equal to 4.5% of all boards produced
3 Total percentage of defective boards produced = 4.5/90 * 100 = 5%
Sravna Test Prep
Free Online course for the GMAT and the GRE