Answer:
C The probability values do not add to 1
Step-by-step explanation:
Given
The above table
Required
Why is it not a probability distribution
In probability, the sum of all probabilities must equal 0.
But in this case:
![\sum P(x) \ne 0](https://tex.z-dn.net/?f=%5Csum%20P%28x%29%20%5Cne%200)
Because:
![0.08 + 0.23 + 0.44 + 0.12 + 0.24 \ne 0](https://tex.z-dn.net/?f=0.08%20%2B%200.23%20%2B%200.44%20%2B%200.12%20%2B%200.24%20%5Cne%200)
![1.11 \ne 0](https://tex.z-dn.net/?f=1.11%20%5Cne%200)
Hence:
Option (c) answers this question
Answer:
x = ± 3
Step-by-step explanation:
Given
5x² - 45 = 0 ( divide through by 5 )
x² - 9 = 0 ( add 9 to both sides )
x² = 9 ( take the square root of both sides )
x = ±
= ± 3
Thus the roots are x = - 3, x = 3
Answer:
Step-by-step explanation:
1/2(-9+n)=20
n=40+9
n=49
2.5 = 2 5/10 as a Mixed fraction
To get a improper fraction, multiply the whole number with the denominator, and then add the numerator to the answer, giving the numerator (keep the denominator number)
2 x 10 = 20
20 + 5 = 25
25/10 is your answer
hope this helps
Answer:
![5)\ f(n) = 4v](https://tex.z-dn.net/?f=5%29%5C%20f%28n%29%20%3D%204v)
![6)\ \frac{1}{4}n](https://tex.z-dn.net/?f=6%29%5C%20%5Cfrac%7B1%7D%7B4%7Dn)
![7)\ True](https://tex.z-dn.net/?f=7%29%5C%20True)
This might not be correct though. I'm only in middle school lol. I am sure about the last one.