Discrete Random Variables quick quiz

Descrição

A Levels Maths Quiz sobre Discrete Random Variables quick quiz, criado por luisnorth em 12-02-2014.
luisnorth
Quiz por luisnorth, atualizado more than 1 year ago
luisnorth
Criado por luisnorth quase 11 anos atrás
41
1

Resumo de Recurso

Questão 1

Questão
X~B(10,0.5) E(X)=
Responda
  • 0.1
  • 0.5
  • 2.5

Questão 2

Questão
X~Geo(0.5) P(X=0) = 1
Responda
  • True
  • False

Questão 3

Questão
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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