Probability

Question

A certain disease occurs in 0.2% of the population. The most commonly used test for the disease has a false positive rate of 3% and a false negative rate of 2%.  If a person tests positive for the disease, what is the probability that the person actually has the disease?  (Please give your answer in decimal form and round to 4 decimal places.)


Question 18 (4 points)

Question 18 options:

A particular state has license plates that start with a single digit, followed by 3 capital letters, followed by 3 more digits.  Because it looks so much like the letter O, the digit 0 is never used.

How many different license plates can be formed in this state?
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