2. The random variable X has the exponential distribution with mean value 1. The conditional distribution of Y, given that X = x, is exponential with parameter x; that is, for x > 0, fYix (y]x) = { ze-v, y >0, otherwise. fy|x (y\x) =

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Can i get some help with this one? I dont know how to even start.

2. The random variable X has the exponential distribution with mean value 1. The conditional
distribution of Y, given that X
= x, is exponential with parameter x; that is, for x > 0,
fy x (u\x) = { 0"
хе "у, у > 0,
0,
— ху
otherwise.
(a) Find the joint density f(x, y) and the marginal density fy (y).
(b) Find P[0 <Y < 3].
Transcribed Image Text:2. The random variable X has the exponential distribution with mean value 1. The conditional distribution of Y, given that X = x, is exponential with parameter x; that is, for x > 0, fy x (u\x) = { 0" хе "у, у > 0, 0, — ху otherwise. (a) Find the joint density f(x, y) and the marginal density fy (y). (b) Find P[0 <Y < 3].
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