Assignment work: A company has two plants to manufacture scooters. Plant I manufactures 80 per cent of the scooters and Plant II manufactures 20 per cent. In plant I only 85 out of 100 scooters are considered of standard quality. In plant II, only 65 out of 100 scooters are considered of standard quality. What is the probability that a scooter selected at random came from plant I, if it is known that it is of standard quality?

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