Which notation denotes the probability of event A?

Which notation denotes the probability of event A?

• A. p(A)
• B. Probability
• C. Random Sample
• D. Central Limit Theorem

Answer: (A)

Notating the probability of an event uses a function-like symbol that takes the event as its input and outputs a number between 0 and 1. The standard shorthand is p(A) (or P(A)); the parentheses show that A is the argument of the probability function. So p(A) literally means “the probability of A.” The other terms aren’t a notation for a probability of an event. “Probability” is the concept itself, not a symbol you write to denote it. The remaining options refer to a sampling method and a theorem, which are unrelated to how we write the probability of A. In practice, you’ll see P(A) or p(A) used to denote the probability of A, depending on the author’s notation. If you’re given a concrete example, p(A) would be the value you compute for the likelihood that A occurs.

Notating the probability of an event uses a function-like symbol that takes the event as its input and outputs a number between 0 and 1. The standard shorthand is p(A) (or P(A)); the parentheses show that A is the argument of the probability function. So p(A) literally means “the probability of A.”

The other terms aren’t a notation for a probability of an event. “Probability” is the concept itself, not a symbol you write to denote it. The remaining options refer to a sampling method and a theorem, which are unrelated to how we write the probability of A.

In practice, you’ll see P(A) or p(A) used to denote the probability of A, depending on the author’s notation. If you’re given a concrete example, p(A) would be the value you compute for the likelihood that A occurs.