The Herr-McFee Company, which produces nuclear fuel rods,must X-ray and inspect each rod before shipping. Karen Wood, an inspector, has noted that for every 1,000 fuel rods she inspects, 10 have interior, flaws, 8 have casing flaws, and 5 have both flaws. In her quarterly report, karen must include the probability of flaws in fuel rods. What is this probability?