Math Problem Statement
um cubo de madeira com todas as faces pintadas é cortado em 216 cubinhos de tamanhos iguais: seja x o número de faces pintadas de um cubinho escolhido aleatoriamente, calcule o desvio padrão de x
Solution
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Math Problem Analysis
Mathematical Concepts
Probability
Statistics
Expected Value
Variance
Standard Deviation
Formulas
Variance formula: Var(x) = E[x^2] - (E[x])^2
Standard deviation formula: σ = sqrt(Var(x))
Theorems
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Suitable Grade Level
Advanced High School
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