There is a 50% chance Jen will visit Chile this year, while there is a 25% 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?[/b]	Choose one:
A) 25% B) 50% C) 62.5% D) 63.5% E) 75%
The thing to note in the question is she would not be visiting both.   Thus p(Chile)*(1-p(Madagascar))+p(Madagascar)*(1-p(Chile))   which is   (1/2*3/4) + (1/4*1/2),   3/8*1/8=1/2 =50%   Answer: 50%
<result>B</result>
There is a 50% chance Jen will visit Chile this year, while there is a 25% 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?[/b]