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## Main Question or Discussion Point

Prove this questions using ration ideal in intuitive way.

Prove this implications and explain the results:

(a) A _|_ B => not A _|_ not B, onde _|_ means that events A and B are independent.

(b)[ P(A|C) >= P(B|C) ] and [ P(A|not C) >= P(B|not C) ] ==> P(A) > P(B)

Prove this implications and explain the results:

(a) A _|_ B => not A _|_ not B, onde _|_ means that events A and B are independent.

(b)[ P(A|C) >= P(B|C) ] and [ P(A|not C) >= P(B|not C) ] ==> P(A) > P(B)

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