ManriplGiov ManriplGiov

26-11-2016
Mathematics

contestada

How many sets of three integers between 1 and 20 are possible if no two consecutive integers are to be in a set?

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antonsandiego antonsandiego

09-12-2016

I'm pretty sure that the solution looks like this [tex](20-3)!(20-4)!(20-5)!...(20-19)![/tex]. But Also you can use this formula (r-k+1 C r). You will get 18C3.

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