Answer:
<h2>x = 40</h2><h2 />
Step-by-step explanation:
fx=2x-50
Find x when fx=30
30 = 2x - 50
add 50 each side
30 + 50 = 2x - 50 + 50
80 = 2x
x = 80 / 2
x = 40
Answer:
$81.80
Step-by-step explanation:
With the 20% discount it was $13.63 less than $68.17
68.17 × .20 = (Rounds to $13.63 off)
Answer:
200
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
Given the question above :
The probability distribution :
X : ___ 1 ___ 2 ___ 3 ___ 4 ____ 5
P(x): _ 0.1 __ 0.1 __ 0.6 _ 0.1 __ 0.1
The Variance : Var(X) = (Σx²*p(x)) - μ²
μ = E(X) = Σ(X * p(x)) :
Σ(X * p(x)) = (1*0.1)+(2*0.1)+(3*0.6)+(4*0.1)+(5*0.1)
μ = 3
Var(X): [(1^2*0.1)+(2^2*0.1)+(3^2*0.6)+(4^2*0.1)+(5^2*0.1)] - 3²
= 10 - 9
= 1
Hence. Variance = 1
