funny thing...
the actuals
odds of flopping "trips or better" is almost exactly 12%.
Iif you have pocket Tens, then the odds of flopping 3 tens (or better) is 11.75 % - but there's also a .25% chance of a trip board (e.g. 999) for a fullhouse, making it pretty much spot on 12% to flop trips/boat/quad.
Weird how it works out, huh?