Ok guys, I dont really understand conditional probability, can you guys tell me how to go about solving this? To please customers, repairs need to be done satisfactorily and completed on time. For one mechanic, if the job is done on time, he has a 85% chance that it was also done satisfactorily. He completes 77% of his jobs on time. Whats the probability that a customer leaves the workshop happy? Cheers guys.