Marginal probability is also called simple probability

Events that cannot occur together are said to be ….

Two events are said to be …. if the occurrence of one does not affect the probability of the occurrence of the other

P(A) + P(A’) = …

The probability of the intersection of two events is called their … probability

In independent events P(A and B) =

Random variable

A random variable that assumes countable values is called a

The time taken to commute from home to work

PD of DRV lists all the possible values that the random variable can assume and their corresponding probabilities.

The mean of a discrete random variable 𝑥 is also called its expected value and is denoted by 𝐸(𝑥)

𝝁 = 𝜮𝒙𝑷(𝒙)
𝑬(𝒙) = 𝜮𝒙𝑷(𝒙)

𝝈 = √𝚺𝒙^𝟐𝑷(𝒙) – 𝝁^2