Just to add fuel to the fire
10.6% of the time, or about 1 out of 9 times.
And the probability of dealer hitting 21 with a face 6 is 0.9% – and this is assuming it’s just one player against the dealer.
Now, calculate that I was playing 2 hands at the same time, and both hands came up as 20 (2×10 each), – how low do you think this number will get?
And if you add the fact that the dealers hand came out as 6-5-10 this lowers the probability even more, as four 10s are already out.