there are 4 rows and 4 columns who many ways x is down and he travel directly to y is up of right corner and x is left of down corner?

Question

gre question how to slove sir show me how to find paths

Answer 1

http://en.wikipedia.org/wiki/File:Catalan_number_4x4_grid_example.svg

Answer 2

Habeeba,

Your question is total mush. Please restate the physical situation, the proposed allowed travel moves of the "he", and the desired end result -- is it number of distinct paths, average length of path, or what? (If you let the "he" wander around on a 4 x 4 matrix without any limits, the number of distinct paths is infinite, and the average path length is also I suspect infinite; depends perhaps on which ways "he" can finish a path).