Two stores sell a certain product. Store A has 45% of the sales, 3% of which are of defective items, and store B has 55% of the sales, 4% of which are of 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

Step-by-step explanation:

Given

Stot A:

Defective = 3%

Store B

Defective = 4%

Required

Determine the probability a product received is defective.

First, we calculate the probability that the defective product is from store A

Convert to decimals

Next, we calculate the probability that the defective product is from store B

The product may come from either stores.

So, the probability of having a defective product is:

the answer is 31.27mph

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