1. the chance that an engineer correctly chooses the right material for a piping system is 0.7. if it is known that if the engineer makes the wrong selection, the probability that the client files a case is 0.9. what is the probability that the engineer makes an incorrect material selection and the client files a case? 2. a container contains 2 purple handkerchiefs and 2 red handkerchiefs. two handkerchiefs are drawn at random. find the probability they have the same color.