Combinatoricsmedium
0:00.0
A path on a grid moves from (0,0) to (3,3) using steps of (1,0) or (0,1). How many paths avoid the point (1,1)?
A path on a grid moves from (0,0) to (3,3) using steps of (1,0) or (0,1). How many paths avoid the point (1,1)?