Question: Which of the following is correct? A continuous random variable has a probability density function but not a cumulative distribution function. A discrete random variable

  1. Which of the following is correct?
  1. A continuous random variable has a probability density function but not a cumulative distribution function.
  2. A discrete random variable has a probability mass function but not a cumulative distribution function.
  3. A continuous random variable has a probability mass function, and a discrete random variable has a probability density function.d.
  4. A continuous random variable has a probability density function, and a discrete random variable has a probability mass function

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