Unit Cubes 3 – $5 \times 5$ Edges

Probability

If someone painted the outside of a $5 \times 5 \times 5$ cube made out of $1 \times 1 \times 1$ unit cubes, how many unit cubes would have paint on exactly 2 sides?

Unit Cubes 3 – 5×5 5 \times 5 5×5 Edges

Unit Cubes 3 – $5 \times 5$ Edges