You roll a 5, flip a Head, and draw an Ace?

Ok, now assuming it is 1/6 for rolling a "5", 1/2 for getting "heads", and 1/13 for drawing an "Ace", what does one do with these fractions:

MULTIPLY THEM !!

(1/6) (1/2) (1/13) = 1/156

If you have a 36-card deck with 4 aces then replace the 1/13 ratio with 1/9

The probability in this case 1/108

Very small chance (less than 1%) either way.

Do not bet on being able to get that result very often.