Exercise 10.
How many lattice paths start at (3,3) and
end at (10,10)?
end at (10,10) and pass through (5,7)?
end at (10,10) and avoid (5,7)?
How many lattice paths start at (3,3) and
end at (10,10)?
end at (10,10) and pass through (5,7)?
end at (10,10) and avoid (5,7)?