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Lovers Meet - Part 4

Anna and Ben live at opposite corners of a 2 by n block.
If Anna only moves right or up or down, and isn't allowed to retrace her steps, how many ways does she have to get to Ben?

How many ways can you find to prove your guess?

Note by Chung Kevin
2 years ago

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2^(n-1) Mobin Mithun · 2 years ago

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@Mobin Mithun can you explain ? Raven Herd · 1 year, 7 months ago

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