Of 600 car parts produced, it is known that 350 are produced in one plant, 150 parts

Question:

Of 600 car parts produced, it is known that 350 are produced in one plant, 150 parts in a second plant, and 100 parts in a third plant. Also it is known that the probabilities are 0.15, 0.2, and 0.25 that the parts will be defective if they are produced in the first, second, or third plants, respectively. What is the probability that a randomly picked part from this batch is not defective?