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Level
2
There is a 10 x 15 grid of lines.How many ways are there to get from the top left point to the bottom right(Assume progress is always being made)?
The answer is 3268760.
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1 solution
The answer is 25 choose 10(or 15) because we have to choose out of 25 moves 10 to be right and and 15 to downwards.