X~B(10,0.5)
E(X)=
0.1
0.5
2.5
X~Geo(0.5)
P(X=0) = 1
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?
14/39
20/39
1
20/169
0
5/39
X~Geo(p)
E(x) = ?
1/p
(1-p)^x-1 * p
np
Σ(x^2 * p) - μ^2
