Prop bet: probability of hitting a J, 7, or 2 on the flop

[AaronBrown]

There are 40 cards that are not J, 7 or 2. So your chance of losing is:

(40/52) x (39/51) x (38/50) = 59,280 / 132,600 = 44.7%

55.3% of the time, at least one J, 7 or 2 shows up on the flop.

[Poker_Ace]

Thanks!