+0  
 
0
54
1
avatar+44 

If 1% of the planets in the universe contain water, and astronomers develop a test that is 95%
accurate for determining whether or not a planet contains water, then what is the probability that a planet
identified by the test as containing water really does contain water? Express your answer as a common
fraction.

 

(I had no idea where to start with this one)

 Nov 1, 2022
 #1
avatar+33271 
+2

One way of reasoning is as follows:

 

 

That should be 0.059 not 0.59.

 Nov 2, 2022
edited by Alan  Nov 2, 2022

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