Math Problem Statement
Uma caixa contém 6 bolas brancas e 2 pretas. Rrtira-se uma por uma, sem reposição, até aparecer uma branca. Seja X o número de bolas retiradas. Calcule o desvio padrão de X.
Solution
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Math Problem Analysis
Mathematical Concepts
Probability Theory
Expected Value
Variance
Standard Deviation
Formulas
Expected Value formula
Variance formula
Standard Deviation formula
Theorems
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Suitable Grade Level
University
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