Supposed you go to a conference attended by 20 canadians and 20 norwegians. How many people must you meet to be certain that you have met two people of the same nationality?
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Let's look at the worst case scenario ....the first two people you meet are 1 Canadian and 1 Norwegian.....the NEXT person you meet will be one of those two.....and you will have met two people of the same nationality soooooo 3
