Answer:
6
Step-by-step explanation:
(-2/3)(-9)
1) Use this rule: a/b * c = ac/b.
-2 * -9/3
2) Simplify -2 * 9 to 18.
18/3
3) Simplify.
well E(X)=µ and
Var(X)=E[(X-µ)^2]