If the discrete random variable $x$ is uniformly distributed over the integers from $10$ to $20$ inclusive, what is the probability that $x$ equals $15$?

Given that $x$ has a Poisson distribution with parameter $\lambda$, which of the following is the correct expression for the probability that $x$ equals $k$?

Which of the following is a criterion for a binomial probability experiment?

Given the following table showing the possible values of a random variable $X$ and their probabilities: Value of $X$: $0$, $1$, $2$, $3$; Probability: $0.1$, $0.3$, $0.4$, $0.2$. Is the random variable $X$ discrete or continuous? Explain your answer.

Which of the following is every discrete random variable associated with?

Given the following probability distribution for the discrete random variable $y$: $\begin{array}{cccc}y& 1& 2& 3\\ P\left(y\right)& 0.2& 0.5& 0.3\end{array}$ What is the expected value of $y$?