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saw this math problem and couldnt figure it out:(im a fucking retard)
how many combinations of 12345 that make up single positive integers
are there, counting only the combinations where the 1 is left of 2
(like 12'345 and 15'234 and so on)
i guess you find out how many total combinations are there starting with 1, then take out all the combinations starting with 2 and then the hard part is calculating the rest? i cant find anything online desu
pic related im taking a massive shit