100 suppre 31
37. A company has two plants to manufacture scooters. Plant I manufactures 80% of scooters and
plant II manufactures 20%. At plant I, 85 out of 100 scooters are rated standard quality. At plant
II, only 65 out of 100 scooters are rated standard quality. What is the probability that scooter
came from plant II if it is known that the scooter is of standard quality.