Question 729490
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Q.two stores sell a certain product. Store A has 36% of the sales, 2% of which are defective items, 
and store B has 64% of the sales, 1% of which are defective items. 
The difference in defective rates is due to different levels of pre-sale checking of the product. 
A person receives one of this product as a gift. What is the probability it is defective?

Can you explain how to come out with a solution for this type of problem.?
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<pre>
The probability that one of this product is defective is

     0.36*0.02 + 0.64*0.01 = 0.0136.    <U>ANSWER</U>
</pre>

Solved.