Counting Routes!

Probability Level 3

The image shows the 66 ways(routes) through which one can go from one point to the other in a 2×22 \times 2 grid.

How many different routes can you find through a 4×44 \times4 grid?

Note :This can be generalized for n×nn \times n grid

Also try

1) Counting Squares!

2) Counting-lines!

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