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545136
Discrete Random Variables quick quiz
Description
A Levels Maths Quiz on Discrete Random Variables quick quiz, created by luisnorth on 12/02/2014.
No tags specified
maths
maths
a levels
Quiz by
luisnorth
, updated more than 1 year ago
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Created by
luisnorth
almost 10 years ago
35
1
0
Resource summary
Question 1
Question
X~B(10,0.5) E(X)=
Answer
0.1
0.5
2.5
Question 2
Question
X~Geo(0.5) P(X=0) = 1
Answer
True
False
Question 3
Question
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?
Answer
14/39
20/39
1
20/169
0
5/39
Question 4
Question
X~Geo(p) E(x) = ?
Answer
1/p
(1-p)^x-1 * p
np
Σ(x^2 * p) - μ^2
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