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De cuántas maneras se pueden dar primer y segundo premio entre 10 personas?
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De cuántas maneras se pueden dar primer y segundo premio entre 10 personas?

User Calum
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hay diez opciones para dar el primer premio, y despues nueve opciones para dar segundo premio. 10 x 9 = 90, asi que hay 90 maneras para dar estos premios
User Suen
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