factory produces widgets. At the end of production, there is a quality assurance process that rejects all faulty widgets. On the first day of the month, the factory produced 211 widgets, 13 of which were faulty. On the second day, the factory produced 188 widgets, 20 of which were faulty. On the third day, the factory produced 201 widgets, 26 of which were faulty. Based on these 3 days, what is the experimental probability that a unit is not faulty?

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