Theory of Poker Effective Odds Question

[Chipp Leider]

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Suppose you are looking at an open ended straight on the flop. With eight outs you are roughly 4-1 to hit it on the turn and about 2-1 to hit it on the turn or river.

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Make that roughly 5-1 on the turn (4.88-1) and roughly 2-1 on the turn or river (2.18-1).