# Calculating Probabilities

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A manufacturer has two plants that produce the same product...Plant A and Plant B...Plant A has 60% of the total production and has a 5% defective rate...Plant B has 40% of the total production with a 7.5% defective rate...

1. What is the total defect rate? I came up with 6%...????

2. A randomly selected product was defective. What is the probability that it came from Plant A?

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##### Solution Summary

This problem will explain how to calculate probabilities.

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<br>Plant A: 3 out of every 60 pieces are defective

<br>Plant B: 3 out of the 40 pieces are defective

<br>When you add ...

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