Brain Teasers Optical Illusions Puzzle Hunts Codes & Ciphers Mechanical Puzzles
Personal Links
Browse Teasers
Search Teasers

Drug Tests

Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.

 

Puzzle ID:#8782
Fun:*** (2.29)
Difficulty:*** (2.2)
Category:Probability
Submitted By:lesternoronha1****

 

 

 



10% of the people in a certain population use an illegal drug. A drug test yields the correct result 90% of the time, whether the person uses drugs or not. A random person is forced to take the drug test and the result is positive. What is the probability he uses drugs?




What Next?

  
  

See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.

 




Back to Top
   


Online Now
11 users and 709 guests

Users In Chat
autumn
Follow Braingle!
Fold 'N Fly Paper Airplanes
Easy to follow folding instructions and videos.
Copyright © 1999-2017 | FAQ | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise | Braingle Time: 9:03 am
Sign In Create a free account