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Hero is delt kqo in mp1.

folds to hero, hero raises. 24/12/1.8 guy directly to hero's left 3 bets. folds to hero.
hero calls.

Flop comes: K 5 5

what is plan for hand?

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You should check and call all the way. If the villain has a worse hand than you like AQ or QQ,JJ,TT. Why would you want to play back at him and make him fold? You make a lot more money letting the villain bet these 2 or 3 outer type hands all the way. And if the villain has a better hand than you like AK,KK or AA, you minimize your loss by checking and calling. This is a classic example where checking and calling gets the most money in the long run.