Question

A grid is set up as shown using 5 horizontal and 6 vertical lines. What are the no. of ways one can go from point P to point Q walking along the grids but not moving upwards or left or retracing a grid?

• A. 21
• B. 35
• C. 56
• D. None of these

Answer 1

The correct option is D

None of these

There are 4 rows and 5 columns. Using the one-zero method, number of paths will be ${}^9$C${}_4$ = 126 ways