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| rev | Admin | (Created page with "'''Solution: B''' <math display = "block">\frac{U}{1-U} \leq 1/4 \Leftrightarrow 4U \leq 1-U \Leftrightarrow U \leq 1/5</math> Hence the probability equals 1/5.") | Jun 28'24 at 22:29 | +163 |