Concept
How do you calculate the probability that someone besides Chad wins?
Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk / Chapter 1
"Pr({Chad}) = 1 − Pr({Chad}), so we just need to figure out the probability that Chad wins, and take one minus that. Clearly if Pr({Ben, Chad}) = .3 (as we were told), and Pr({Ben}) = .1 (as we computed), then Pr({Chad}) = .2, and the probability of a non-Chad winner is .8."
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