An urn contains $5$ red and $2$ black balls. Two balls are randomly drawn. Let $X$ represent the number of black balls. What are the possible values of $X?$ Is $X$ a random variable?
(N/A) The two balls selected can be represented as $BB$,$BR$,$RB$,and $RR$,where $B$ represents a black ball and $R$ represents a red ball.
$X$ represents the number of black balls.
$X(BB) = 2$
$X(BR) = 1$
$X(RB) = 1$
$X(RR) = 0$
Therefore,the possible values of $X$ are $0, 1,$ and $2$.
Yes,$X$ is a random variable because it is a real-valued function whose domain is the sample space of a random experiment.
$X$ represents the number of black balls.
$X(BB) = 2$
$X(BR) = 1$
$X(RB) = 1$
$X(RR) = 0$
Therefore,the possible values of $X$ are $0, 1,$ and $2$.
Yes,$X$ is a random variable because it is a real-valued function whose domain is the sample space of a random experiment.
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