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{\displaystyle P={\frac {C_{2}^{5}\,C_{1}^{3}}{C_{3}^{12}}}={\frac {{\frac {5!}{2!\,3!}}\,{\frac {3!}{1!\,2!}}}{\frac {12!}{3!\,9!}}}={\frac {3}{22}}}
{\displaystyle P={\frac {C_{2}^{5}\,C_{1}^{3}}{C_{3}^{12}}}={\frac {{\frac {5!}{2!\,3!}}\,{\frac {3!}{1!\,2!}}}{\frac {12!}{3!\,9!}}}={\frac {3}{22}}}
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