Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% 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 a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275
B. 0.22
C. 0.5667
D. 0.7083
Answer: A
Mathematics
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Find the exact function value.cot-1(-1)
A. 
B. 
C. - 
D. - 
Mathematics
Translate to an equation, then solve.Twice the difference of four and n is the same as four subtracted from negative one times n.
A. 2(n - 4) = 4 - n, n = 4 B. 2(4 - n) = -n - 4, n = 2 C. 2(4 - n) = -n - 4, n = 12 D. 2(4 - n) = -n - 4, n = 4
Mathematics
Use the horizontal line test to determine whether the function is one-to-one.
A. Yes B. No
Mathematics
Write percents as decimals and decimals as percents.0.0087 of all products produced at a certain factory contain defects.
A. 0.87% B. 0.087 C. 8.7% D. 87%
Mathematics