545136
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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