Mathematics, 13.11.2019 21:31 wafflewarriormg

How many pair combinations of numbers are there possible using 1000 numbers were duplicate numbers example 11 would be a new combination and diferant number order of numbers would also be considered as a different pair. example a b and b a would be considered as a different pair. so, do the math and tell me how pairs i can have this 1000 different numbers or letters or objects or graphics or whatever can i have with the 1000?

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How many pair combinations of numbers are there possible using 1000 numbers were duplicate numbers e...