SOLUTION: 1 .A plane carries 140 passengers. It is known that the average weight of all passengers on that plane is 147.14 pounds, that the men on that plane weigh on the average 170 pounds

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Question 853780: 1 .A plane carries 140 passengers. It is known that the average weight of all passengers on that plane is 147.14 pounds, that the men on that plane weigh on the average 170 pounds, and women 130 pounds. How many men and how many women were on the plane?
2. A company that performs drug testing guarantees that its test determines a positive result with 97% accuracy. however the test also gives 6% false positives. if 5% of those being tested actually have the drug present in their bloodstream, find the probability that a person testing positive has actually been using drugs.
3. A test for genetic disorder can detect the disorder with 94% accuracy. however the test will incorrectly report positive result for 3% of those without the disorder. If 125 of the population has the disorder, find the probability that a person testing positive actually has the genetic disorder.
4. A pharmaceutical company has developed a test for a scarce disease that is present in 0.5% of the population. The test is 98% accurate in determining a positive result, and the chance of a false positive is 4%. what is the probability that someone who tests positive actually has the disease?
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

Note: Site Directions encourage 1 question/post

1)  = 147.14   Solve for x

2) 

3) For these 125, P = 100%

4)  

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