A bag contains 5 white rabbits and 8 black rabbits. As part of a magic trick, two are removed at the same time. What is the probability they are both white?
Responda
14/39
20/39
1
20/169
0
5/39
Questão 4
Questão
X~Geo(p)
E(x) = ?
Responda
1/p
(1-p)^x-1 * p
np
Σ(x^2 * p) - μ^2
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