A certain product was found to have two types of minor defects. The probability that an item of the product has only a type 1 defect is 0.2, and the probability that it has only a type 2 defect is 0.3. Also, the probability that it has both defects is 0.1. Find the probability of picking product which is defective.  a. 1.2 b. 0.6 c. 0.9 d. 2

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