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#2**+1 **

P("choose fair coin") = 24/25

P("choose unfair coin") = 1/25

P("6H under the condition fair coin")\(= 2^{-6} = \frac{1}{64}\)

P("6H under the condition unfair coin")=1

let **a**=P("choose fair coin") * P("6H under the condition fair coin") = 24/25 * 1/64

let **b**=P("choose unfair coin") * P("6H under the condition unfair coin") = 1/25

\(\frac{b}{a+b} = \frac{m}{n} = \frac{8}{11}\)

m+n=19

Guest Jan 26, 2019