Editing 2379: Probability Comparisons
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| You guess the last four digits of someone's {{w|Social Security Number}} on the first try | | You guess the last four digits of someone's {{w|Social Security Number}} on the first try | ||
β | | There are | + | | There are 10 digits in a {{w|Social Security Number}}, but the last four are commonly used as an identity verification factor. (1/10)<sup>4</sup> = 0.0001, or 0.01% |
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