Answer:
μ ≈ 2.33
σ ≈ 1.25
Step-by-step explanation:
Each person has equal probability of ⅓.
The mean is the expected value:
μ = E(X) = ∑ X P(X)
μ = (1) (⅓) + (2) (⅓) + (4) (⅓)
μ = ⁷/₃
The standard deviation is:
σ² = ∑ (X−μ)² P(X)
σ² = (1 − ⁷/₃)² (⅓) + (2 − ⁷/₃)² (⅓) + (4 − ⁷/₃)² (⅓)
σ² = ¹⁴/₉
σ ≈ 1.25
<span>The correct answer is C.
This is because you need a first term that equals 14.5, for when n = 1.
So, you can determine this by using n=1 in each equation until you find one that works. When you stick 1 in for n in answer C, it looks like this:
18 - 3.5n
18 - 3.5(1)
18 - 3.5
14.5 ---> This is the answer that we are looking for.
This will not work for any of the other options. </span>
I hope this helps you
25y^2+60y+36-24=0
25y^2+60y+8 =0
disctirminant =60^2-4.25.8
disctirminant =3600-800
disctirminant =2800
x1= -60+square root of 2800/2.25
x1= -60+52.91/50= -7.09/50= -0.14
x2= -60- square root of 2800/2.25
x2= -60-52.91/50
x2= -2.25
Answer:
p=0
Step-by-step explanation:
When you isolate both variables, one side becomes 0.
(3/10) / (4/5)
= (3/10) x (5/4)
= (3x5) / (10x4)
= 15/40
GCF = 5 so divide numerator and denominators by 5
= 3/8
The answer is 3/8