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A
.gov website belongs to an official
government organization in the United States.
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Randomness at work: we have already seen or heard about at least one infection (black ball) among our ten friends, colleagues, or contacts (white balls); so the obvious questions are: how many more infections (black balls) are hidden in the jar, i.e. possible in the future, and what is the risk of drawing a black ball, i.e. of infection?.
