Why do exactly 11 out of 36 rolls contain at least one specific number (like a 6)? Because Row 6 has 6 rolls, Column 6 has 6 rolls, and Double-6 (6-6) sits at their intersection: 6 + 6 - 1 = 11 (30.6%)!
In a pure race without gammons, passing a double forfeits 1 point, while taking risks 2 points to win 2 points—meaning your mathematical Take Point is exactly 1 / 4 = 25% winning probability!