Use Random-Variable Notation to Represent the Event $\{ Y = 3 \}$

Multiple Choice

Use random-variable notation to represent the event.
-For a randomly selected student in a particular high school, let Y denote the number of living grandparents of the student. Use random-variable notation to represent the event that the student Obtained has exactly three living grandparents.

A) $\{ Y = 3 \}$
B) $\{ \mathrm { Y } < 3 \}$
C) $P \{ Y = 3 \}$
D) $\{ Y \geq 3 \}$