Super D is a major video distributor that purchases blank SD Drives from twosources: DiskMakers, which provides 65% of the SDDrives, and MediaSupply, which provides the remaining 35%. Historically, 2% of the SD Drives Super D has purchased from Disk Makers have beendefective, whereas 6% of the SD Drives purchased from Media Supply have been defective. A randomly selected SD Drive is found to be defective. UseBayes' Theorem to determine the probability that the SD Drive came from Disk Makers.