- CFA Exams
- CFA Level I Exam
- Study Session 3. Quantitative Methods (2)
- Reading 9. Common Probability Distributions
- Subject 2. Probability Function

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**CFA Practice Question**

That which specifies the probability that the random variable takes on a specific value is known as the ______.

A. probability function

B. probability density function

C. cumulative distribution function

**Explanation:**The probability function specifies the probability that the random variable takes on a specific value.

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**User Contributed Comments**
3

User |
Comment |
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goalrush |
What is the difference between pdf and pf ? |

sonicskat |
Only thing I can think of is that a pdf is for a continuous rv? I know thats not necessarily true. Looks like this would have even fooled the folks over at Wolfram: http://mathworld.wolfram.com/ProbabilityFunction.html |

edrei7 |
Probability density functions deal with continuous RVs. Probability mass functions deal with discrete RVs. |