is this math right for flopping a set?

[jerryf1914]

odds of being dealt a pp 3/51

odds of flopping a set after already holding a pp 2/50 + 2/49 + 2/48

odds of flopping a set (3/51) * (2/50 + 2/49 + 2/48) = 138 to 1

is my math wrong because i'm definitely not flopping a set every 139 hands. but when i play live i do seem to flop a set more often than i do online.

perhaps this is proof that online poker is rigged?

[TheSalche]

your math is wrong, you're doing a permutation not a combination

permutation: order matters (board of 987 is not the same as 978)
combination: order doesn't matter (board of 987 = board of 789)

[greggg230]

3/51 * 1/9, roughly. you nerds can figure it out yourselves!

[Restlys]

any good book/site/ place where all the maths are at one spot that one could easily put right beside his computer letsay?? /images/graemlins/laugh.gif