[quirkasaurus]

Thanks for the replies. It took a few days to find my
thread again.

So how should one calculate odds ??

I saw a book once say that the shorthand method,
is just count up your draws, multiple by 2 and
subtract 2.

In this case, that would come out to be 58%.

Angus -- reread your answer while replying.

I think I got it: The 2nd card odds only come
into play when the first odds don't hit.

So... to rephrase:

(15/45) + ( 30 / 45 ) * ( 15 / 44 )

( outs/cards_left ) + ( 100 - (outs/cards_left) ) *
( outs / ( cards_left - 1 ))

Sound good ? Do you guys actually do these
calculations over the table ?? Or are there
only a few of these numbers that are really
important ?

Do you agree with these calculations:

Post-flop:
%-age needing 1 to make flush: 36%
%-age open-ended straight draw: 32%
%-age to improve after hitting trips: 34% ( 7 outs, 10 on river if you miss )

And finally, do you know what these odds are:

Pre-flop:
%-age hitting 2 pair w/ 2 different hold cards:
%-age hitting trips with a pocket pair: