Use random-variable notation to represent the event.
-Suppose that two balanced dice are rolled. Let X denote the sum of the two numbers. Use random-variable notation to represent the event that the sum of the two numbers is less than 4.
A) $\{ X \leq 4 \}$
B) $\{ X

Question

Use random-variable notation to represent the event.
-Suppose that two balanced dice are rolled. Let X denote the sum of the two numbers. Use random-variable notation to represent the event that the sum of the two numbers is less than 4. 
A) $\{ X \leq 4 \}$
B) $\{ X < 4 \}$
C) $\{ X + Y < 4 \}$
D) $( 1,1 ) , ( 1,2 ) , ( 2,1 )$

Quizplus · Accepted Answer

The event that the sum of the two numbers is less than 4 is correctly represented by $\{ X < 4 \}$, as it includes sums of 2 and 3, but not 4.

Use Random-Variable Notation to Represent the Event {X≤4}\{ X \leq 4 \}{X≤4}

Use Random-Variable Notation to Represent the Event $\{ X \leq 4 \}$