I know that yields the correct answer but how do I know I should divide the expression by two from the problem statement?
I know that yields the correct answer but how do I know I should divide the expression by two from the problem statement?
You could do a couple of steps forward in solving the equations but the intuitive explanation is something along the lines of: Assuming the ball costs nothing the total comes to $1. If the total is more than that then it means that both the ball and the bat have an increased price by an equal amount. So the difference from $0 of the ball is going to be half the difference between the total and $1.
http://psychcentral.com/news/2011/09/21/cognitive-style-tends-to-predict-religious-conviction/29646.html
I think this is the source but I can't be sure:
http://www.apa.org/pubs/journals/releases/xge-ofp-shenhav.pdf
http://lesswrong.com/lw/7o4/atheism_autism_spectrum/4vbc
Reddit /r/psychology discussion