- A box contains four tickets with numbers 1, 1, 2, 3. Draw two tickets at random with replacement, and let the random variable X be the number in the first ticket, and Y the umber in the second ticket. Calculate cov (X, Y)

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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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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**Question 1:**
A box contains four tickets with numbers 1, 1, 2, 3. Draw two tickets at random with replacement, and let the random variable \( X \) be the number on the first ticket, and \( Y \) the number on the second ticket. Calculate \( \text{cov} (X, Y) \).

**Question 2:**
Using the appropriate value of \( k \), compute the covariance of the random variables \( X \) and \( Y \).

\[ 
f(x, y) = 
\begin{cases} 
k(x^2 + y^2), & 0 \leq x \leq 1 \text{ and } 0 \leq y \leq 1 \\
0, & \text{otherwise}
\end{cases} 
\]
Transcribed Image Text:**Question 1:** A box contains four tickets with numbers 1, 1, 2, 3. Draw two tickets at random with replacement, and let the random variable \( X \) be the number on the first ticket, and \( Y \) the number on the second ticket. Calculate \( \text{cov} (X, Y) \). **Question 2:** Using the appropriate value of \( k \), compute the covariance of the random variables \( X \) and \( Y \). \[ f(x, y) = \begin{cases} k(x^2 + y^2), & 0 \leq x \leq 1 \text{ and } 0 \leq y \leq 1 \\ 0, & \text{otherwise} \end{cases} \]
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