Bifalgorithm post · Brisk · Chapter 1

How do you calculate the probability that someone besides Chad wins?

How do you calculate the probability that someone besides Chad wins? (Brisk · Chapter 1) — "Pr({Chad}) = 1 − Pr({Chad}), so we just need to figure out the prob…

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Calculating the probability of a non-Chad winner
The probability of a non-Chad winner is one minus the probability that Chad wins.
Known probabilities
Pr({Ben, Chad}) = 0.3
Pr({Ben}) = 0.1
Subtracting gives Pr({Chad}) = 0.2.
Taking one minus 0.2 gives a non-Chad winner probability of 0.8.

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How do you calculate the probability that someone besides Chad wins?

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"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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