MathProbabilityDiscrete random variables

Probability mass function

Properties of PMF

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What properties the probability mass function of discrete random variable Y denoted by $p_Y(y)$ must satisfy?

Select one or more options from the list

PMF values must always be more than 0

PMF of all

y

's in a discrete random variable

Y

sum up to 1

PMF values must always be more than or equal to 0

PMF of all

y

's in a discrete random variable

Y

sum up to at least 1

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