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A piece of cord is laid out along the path shown on the left. At each of the six points where the path intersects itself, by random choice the cord can either pass over or under where it has already been laid. One possible combination of choices is shown on the right. What is the probability that when the ends of the cord at points A and B are pulled taut the cord will form at least one knot? Express your answer as a common fraction. 

 Jul 15, 2022
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Where is the pic?

 Jul 16, 2022

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