### Find probability to replace or exchange defective item

Assignment Help Basic Statistics
##### Reference no: EM13131614

A manufacturer makes two models of an item : Model I, which accounts for 80% of unit sales, and model II, which accounts for 20% of unit sales. Because of defects, the manufacturer has to replace or exchange 10% of its model I and 18% of its model II. If a model is selected at random, find the probability that it will be defective?

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