Quick for you guys

[ThinkQuick]

I know this comes up every once in a while but can someone confirm this?

Chance of at least one of 3 given cards coming on the flop:

= 1 - P(not coming)

= 1 - [ 10/13 * 39/51 * 38/50 ]

= 1 - 0.4471

= 0.5529 = 55.29%