Let X be an exponential random variable with mean 1 and X, a gamma random variable with mean 2 and variance 2. If X

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53.
Let X be an exponential random variable
with mean 1 and X, a gamma random
variable with mean 2 and variance 2. If X
and X, are independently distributed, then
P(X, < X,) is equal to
(а) 1/2
(с) 2/3
(b) 1/3
(d) none of above
54.
Let X, X2, X,,. be a sequence of i.i.d.
random variables with mean 1. If N is a
geometric random variable with the
probability
....
mass
function
P(N =k)= ,
k =1,2,3,... and it is
independent of the
X,'s, then
E(X, +X,+...+ X,) is equal to.
(а) 2
(c) 20
(b) 50
(d) none of above
Transcribed Image Text:53. Let X be an exponential random variable with mean 1 and X, a gamma random variable with mean 2 and variance 2. If X and X, are independently distributed, then P(X, < X,) is equal to (а) 1/2 (с) 2/3 (b) 1/3 (d) none of above 54. Let X, X2, X,,. be a sequence of i.i.d. random variables with mean 1. If N is a geometric random variable with the probability .... mass function P(N =k)= , k =1,2,3,... and it is independent of the X,'s, then E(X, +X,+...+ X,) is equal to. (а) 2 (c) 20 (b) 50 (d) none of above
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