Let’s take the number .666666 repeating
If we turn it into a fraction it’s 2/3.
It doesn’t matter how many numbers repeat to write a fraction.
Hope this helps.
Point-slope form: y - y₁ = m(x - x₁)
[m is the slope, x₁ and y₁ ---> (x₁, y₁) is the point]
Since you know:
m = 5
(2, 6) = (x₁, y₁) Substitute/plug in the values into the equation
y - y₁ = m(x - x₁)
y - 6 = 5(x - 2) The 1st option is your answer
Answer:
Step-by-step explanation:
Hello!
Given the probabilities:
P(A₁)= 0.35
P(A₂)= 0.50
P(A₁∩A₂)= 0
P(BIA₁)= 0.20
P(BIA₂)= 0.05
a)
Two events are mutually exclusive when the occurrence of one of them prevents the occurrence of the other in one repetition of the trial, this means that both events cannot occur at the same time and therefore they'll intersection is void (and its probability zero)
Considering that P(A₁∩A₂)= 0, we can assume that both events are mutually exclusive.
b)
Considering that
you can clear the intersection from the formula
and apply it for the given events:
![P(A_1nB)= P(B/A_1) * P(A_1)= 0.20*0.35= 0.07](https://tex.z-dn.net/?f=P%28A_1nB%29%3D%20P%28B%2FA_1%29%20%2A%20P%28A_1%29%3D%200.20%2A0.35%3D%200.07)
![P(A_2nB)= P(B/A_2)*P(A_2)= 0.05*0.50= 0.025](https://tex.z-dn.net/?f=P%28A_2nB%29%3D%20P%28B%2FA_2%29%2AP%28A_2%29%3D%200.05%2A0.50%3D%200.025)
c)
The probability of "B" is marginal, to calculate it you have to add all intersections where it occurs:
P(B)= (A₁∩B) + P(A₂∩B)= 0.07 + 0.025= 0.095
d)
The Bayes' theorem states that:
![P(Ai/B)= \frac{P(B/Ai)*P(A)}{P(B)}](https://tex.z-dn.net/?f=P%28Ai%2FB%29%3D%20%5Cfrac%7BP%28B%2FAi%29%2AP%28A%29%7D%7BP%28B%29%7D)
Then:
![P(A_1/B)= \frac{P(B/A_1)*P(A_1)}{P(B)}= \frac{0.20*0.35}{0.095}= 0.737 = 0.74](https://tex.z-dn.net/?f=P%28A_1%2FB%29%3D%20%5Cfrac%7BP%28B%2FA_1%29%2AP%28A_1%29%7D%7BP%28B%29%7D%3D%20%5Cfrac%7B0.20%2A0.35%7D%7B0.095%7D%3D%200.737%20%3D%200.74)
![P(A_2/B)= \frac{P(B/A_2)*P(A_2)}{P(B)} = \frac{0.05*0.50}{0.095} = 0.26](https://tex.z-dn.net/?f=P%28A_2%2FB%29%3D%20%5Cfrac%7BP%28B%2FA_2%29%2AP%28A_2%29%7D%7BP%28B%29%7D%20%3D%20%5Cfrac%7B0.05%2A0.50%7D%7B0.095%7D%20%3D%200.26)
I hope it helps!