Question
A company has two plants to manufacture scooters. Plant-1 manufactures 70 of the scooters and plant-2 manufactures 30%. At plant-1, 30% of the scooters are rated of standard quality and at plant-2, 90% of the scooters are rated as standard quality. A scooter is chosen at random and is found to be of standard quality. Find the probability that it has come from plant 2.