Răspuns:
100%
Explicație pas cu pas:
Permiteți numărul inițial de fotografii = x
x - 50% din x = x - 0,5x = 0,5x
0,5x + câte% din 0,5x = x
x - 0,5x = y% de 0,5x
0,5x / 0,5x = 1
Prin urmare,
100% = 1
Prin urmare, x trebuie mărit cu 100% pentru a reveni la numărul original.
4/11 because it is divisible by seven
Answer:
The required probability is 0.55404.
Step-by-step explanation:
Consider the provided information.
The number of typographical errors on a page of the first booklet is a Poisson random variable with mean 0.2. The number of typographical errors on a page of second booklet is a Poisson random variable with mean 0.3.
Average error for 7 pages booklet and 5 pages booklet series is:
λ = 0.2×7 + 0.3×5 = 2.9
According to Poisson distribution: ![{\displaystyle P(k{\text{ events in interval}})={\frac {\lambda ^{k}e^{-\lambda }}{k!}}}](https://tex.z-dn.net/?f=%7B%5Cdisplaystyle%20P%28k%7B%5Ctext%7B%20events%20in%20interval%7D%7D%29%3D%7B%5Cfrac%20%7B%5Clambda%20%5E%7Bk%7De%5E%7B-%5Clambda%20%7D%7D%7Bk%21%7D%7D%7D)
Where
is average number of events.
The probability of more than 2 typographical errors in the two booklets in total is:
![P(k > 2)= 1 - {P(k = 0) + P(k = 1) + P(k = 2)}](https://tex.z-dn.net/?f=P%28k%20%3E%202%29%3D%201%20-%20%7BP%28k%20%3D%200%29%20%2B%20P%28k%20%3D%201%29%20%2B%20P%28k%20%3D%202%29%7D)
Substitute the respective values in the above formula.
![P(k > 2)= 1 - ({\frac {2.9 ^{0}e^{-2.9}}{0!}} + \frac {2.9 ^{1}e^{-2.9}}{1!}} + \frac {2.9 ^{2}e^{-2.9}}{2!}})](https://tex.z-dn.net/?f=P%28k%20%3E%202%29%3D%201%20-%20%28%7B%5Cfrac%20%7B2.9%20%5E%7B0%7De%5E%7B-2.9%7D%7D%7B0%21%7D%7D%20%2B%20%5Cfrac%20%7B2.9%20%5E%7B1%7De%5E%7B-2.9%7D%7D%7B1%21%7D%7D%20%2B%20%5Cfrac%20%7B2.9%20%5E%7B2%7De%5E%7B-2.9%7D%7D%7B2%21%7D%7D%29)
![P(k > 2)= 1 - (0.44596)](https://tex.z-dn.net/?f=P%28k%20%3E%202%29%3D%201%20-%20%280.44596%29)
![P(k > 2)=0.55404](https://tex.z-dn.net/?f=P%28k%20%3E%202%29%3D0.55404)
Hence, the required probability is 0.55404.
Answer:
(3x - 1)(4x - 3)
Step-by-step explanation:
separating terms it will look like this
(3x - 1)(4x - 3)
when multiple each numbers you will see it will form up as 12x^2 -13x + 3