An urn contains $5$ red and $2$ black balls. Two balls are randomly selected. If $X$ represents the number of black balls, what are the possible values of $X$ ?

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Solution

$X$ can take the values $0, 1, 2$ It is a Random variable because the experiment is a random experiment.

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An urn contains 5 red and 2 black balls. Two balls are randomly selected. Let X represent the number of black balls. What are the possible values of X? Is X a random variable?

Q. An urn contains

5

red and

2

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X

represent the number of black balls drawn. What are the possible values of

X

? Is

X

a random variable? If yes, find the mean and variance of

X

Q. An urn contains 5 red and 2 black balls. Two balls are randomly drawn, without replacement. Let X represent the number of black balls drawn. What are the possible values of X? Is X a random variable? If yes, then find the mean and variance of X. [CBSE 2015]

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An urn contains 5 red and 2 black balls. Two balls are randomly selected. If X represents the number of black balls, what are the possible values of X?

X can take the values 0,1,2 It is a Random variable because the experiment is a random experiment.

An urn contains $5$ red and $2$ black balls. Two balls are randomly selected. If $X$ represents the number of black balls, what are the possible values of $X$ ?

$X$ can take the values $0, 1, 2$ It is a Random variable because the experiment is a random experiment.