23-01-2017
Mathematics

contestada

suppose you could choose 2 boxes of markers. Find all the possible pairs.

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Jedimaster13 Jedimaster13

23-01-2017

2 of anything can only be arranged in 2 orders. a - b , and b - a

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23-01-2017

Since we don't know how many different boxes of markers there are, let's say there are n different boxes.

For your first choice, there are n different boxes, and for the second, n-1 boxes.
So, there will be n^2-n choices.

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