24. The probability that a person has a deadly virus is in one thousand. A test will correctly diagnose this disease 95% of the time and incorrectly on 20% of occasions
a) Find the probability of this test giving a correct diagnosis
b) Given that the test diagnoses the patient as having the disease. what is the probability
that the patient does not have the disease?
c) Given that the test diagnoses the patient as not having the disease. what is the
probability that the patient does have the disease?

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?