Dice Math Knight Versus Dragon Mugs

Description: Dice Math Knight Versus Dragon

Description: A chalk-style white line drawing on a black background. At the top is a 20-sided die. Below are mathematical formulas and variables. In the lower section, a knight holding a shield and wand ponders a friendly dragon, with a question mark above its head. The text "n=1 s=20", complex equations, and "1 / 20^2 =" are visible.

Description: A chalk-line style composition on a black background. At the top is a twenty-sided die with numbers. Below are two probability equations: P(A ∩ B) = P(A)P(B|A) = n(A∩B)/n(S) and d20 roll > x, where P(x) = (21-x)/20. A knight with a shield points at a confused dragon.