Quote Originally Posted by TLR
When you try to calculate odds the math is based on known cards and unknown card.
Lets say you hold 2 of a suite and the flop has 2 more of that suite. There are 9 remaining of that suite out of the 47 remaining card. The chance of completing the flush in the turn or river = 1-(38/47*37/46) = 0.35%.
In the example you gave there are less outs since 3c gives Hand1 a full house, and any cards that pairs the board gives Hand1 a full house, so it amount apprently to 25%
Duh! Forgot about the boat. Now it makes sense.

Best,
EW