stats q..plz help.

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stats q..plz help.

ashish
If random variable X has probability density function given by
f (x) = e^(-x) x

       = 0 Otherwise

Find P [2x + 3 = 5]


a) 1/2
b) 1/4
c) 0
d) 1
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Re: stats q..plz help.

Kogo
Is the answer 0?
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Re: stats q..plz help.

Sinistral
In reply to this post by ashish
ashish wrote
If random variable X has probability density function given by
f (x) = e^(-x) x

       = 0 Otherwise
"otherwise" ?? what is the domain of f(x) then, where it is not zero?
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 "You don't have to believe in God, but you should believe in The Book." -Paul ErdÅ‘s