There is a 50% chance Jen will visit Chile this year, while there is a 50% chance that she will visit Madagascar this year. What is the probability that Jen will visit either Chile or Madagascar this year, but NOT both? Choose one.
A) 25.0%  B) 50.0%  C) 62.5%  D) 75.0%  E) 80.0%
P(Chile and not Madagascar) = 0.5*0.5= 
<gadget id="calculator">0.5*0.5</gadget>
<output>0.25</output>
0.25   P(Madagascar and not Chile)= 0.5*0.5= 
<gadget id="calculator">0.5*0.5</gadget>
<output>0.25</output>
0.25   Total probability= 0.25 + 0.25= 
<gadget id="calculator">0.25 + 0.25</gadget>
<output>0.5</output>
0.5= 50%   The answer is 50.0%.
<result>B</result>
There is a 50% chance Jen will visit Chile this year, while there is a 50% chance that she will visit Madagascar this year. What is the probability that Jen will visit either Chile or Madagascar this year, but NOT both?