Random Variables and Probability Distributions Practice Test

A shipping company tracks the number of days a randomly selected package takes to arrive after it is shipped. Let $D$ be the discrete random variable representing the delivery time in days (1, 2, 3, or 4). The probability distribution of $D$ is shown in the table. Which statement correctly interprets the random variable?

A local library tracks how many books a randomly selected visitor checks out in a single visit. Let $B$ be the discrete random variable representing the number of books checked out (0, 1, 2, 3, or 4). The probability distribution of $B$ is shown in the table. Which statement correctly interprets the random variable?