Answer:
La probabilidad es [tex]0.2508[/tex]
Step-by-step explanation:
Sabemos que según datos de una empresa aseguradora de vehículos, dos de cada cinco accidentes son provocados por conductores en estado de ebriedad. Entonces, si definimos el evento
[tex]A[/tex] : ''Accidente provocado por un conductor en estado de ebriedad''
La probabilidad de este evento es
[tex]P(A)=\frac{2}{5}[/tex] (dato del problema)
Por lo tanto, en cada accidente que ocurre, la probabilidad de que ocurra el evento [tex]A[/tex] es [tex]\frac{2}{5}[/tex] .
Ahora bien, si suponemos cada uno de estos accidentes independientes y con probabilidad de ocurrencia ''p'' constante a lo largo del tiempo, estamos ante la presencia de un proceso Bernoulli.
Dado un proceso de Bernoulli, definimos la variable aleatoria discreta ''[tex]X[/tex]'' como el número de éxitos del proceso Bernoulli para un número fijo de ensayos.
En este caso vamos a definir
[tex]X[/tex] : ''Número de accidentes provocados por conductores en estado de ebriedad de un total de n accidentes''
Se dice que [tex]X[/tex] tiene distribución binomial de parámetros ''n'' y ''p''.
Lo denotamos [tex]X[/tex] ~ Bi (n,p)
En nuestro ejercicio el valor de ''n'' es 9 (son los ensayos que fijamos) y el valor de ''p'' es [tex]\frac{2}{5}[/tex] (definimos como ''éxito'' que el accidente sea provocado por un conductor en estado de ebriedad).
Ahora bien para calcular probabilidad vamos a utilizar la siguiente fórmula :
[tex]P(X=x)=(nCx)p^{x}(1-p)^{(n-x)}[/tex] (I)
'' [tex]P(X=x)[/tex] '' es la probabilidad de que la variable aleatoria [tex]X[/tex] asuma el valor x. En particular, buscamos [tex]P(X=3)[/tex] que es la probabilidad de que de nueve accidentes (fijados), tres sean provocados por conductores en estado de ebriedad.
'' [tex](nCx)[/tex] '' es el número combinatorio definido como
[tex]nCx=\frac{n!}{x!(n-x)!}[/tex]
Reemplazando los datos en la ecuación (I) :
[tex]P(X=3)=(9C3)(\frac{2}{5})^{3}(\frac{3}{5})^{6}=0.2508[/tex]
La probabilidad pedida es [tex]0.2508[/tex]
What’s the missing value of y=-2+4
Answer:
y=2
Step-by-step explanation:
Answer:
y = 2
Step-by-step explanation:
-2 + 4 = 2
therefore, y = 2
r/6=-2 PLZ HELP I HAVE TO TURN THIS IN SOON
Answer:
r=-12
Step-by-step explanation:
multiply 6 on both sides which will be r=-12
Hope this helps
Answer:
r=-12
Step-by-step explanation:
A model of a triangular lawn is scaled to have 1 cm represent 10 yards.
13 cm
8 cm
What is the area of the actual lawn?
From the center to the edge of a DVD measures 60 mm.
RADIUS =
mm
DIAMETER =
mm
CIRCUMFERENCE =
mm
19-6x=-11
what is x?
Answer:
x = 5
Step-by-step explanation:
19 - 6x = -11
-6x= -11 -19
-6x = -30
x= 5
Answer:
x = 5
Step-by-step explanation:
19 - 6x = -11
-6x = -11 - 19
-6x = -30
-6x/-6 = -30/-6
x = 5
19 - 6*5 = -11
19 - 30 = -11
-11 = -11
cos(t) = 4/5
What is the value of t?
Answer:
t = 0.6435 in radians or 36.8699 in degrees
Step-by-step explanation:
Since cos(t) = 4/5, t = inverse cos(4/5) = 0.6435
Insert <, >, or = between the quantities to make a true comparison.
(23-9)+(6+1) 23-9+6+1
a. <
b. >
C.=
Answer:
c
Step-by-step explanation:
It’s the same thing even if you put ()
A tower was built in 5,500 worker-hours. The contractor believes that the learning rate per tower will be 0.80 for additional towers. How many towers will have to be built before the time per tower is reduced to 3,000 worker-hours. How much time will be required for the 16th tower
Answer:
The answer is below
Step-by-step explanation:
Let us assume the relationship between the worker hours and the towers is a linear relationship. A linear relationship is in the form of y = mx + b, where m is the rate of change and b is the value of y when x = 0.
Let y represent the number of worker hours and x represent the number of additional towers. The rate per tower is 0.8 for additional towers. The relationship can be given as:
y = 5500 - 0.8x
a) The number of hours is reduced to 3,000 worker-hours. y = 3000
3000 = 5500 - 0.8x
0.8x = 2500
x = 3125 towers
b) For an additional 16th tower:
y = 5500 - 0.8(16)
y = 5487.2 hours
A right triangle has side lengths
Answer:
tan b
Step-by-step explanation:
help me i'm gonna fail!!!!!!!
Answer:
ok give me brainliest and i'll help
Step-by-step explanation:
Answer:
what is it that u need help with?
2. Using exponents, what is the simplified form of
15x6/3x2
F. 5x4
G. 5x3
H. 5x
I. 5
P.s, the x are the letter x
Answer:
the answer is 5*3
Step-by-step explanation
15*6=90
3*2=6
90/6=15
5*3=15
G
helpppppppppppppp pls
Answer:
9 is the answer
Step-by-step explanation:
Answer:
it is 405
Step-by-step explanation: because you would multiply 3 and 9 and that is 27 then 3 x 5 is 15 the multiply 15 and 27 then you get 405
Solve for c. 9 -b +c = p
Answer:
c=p-9+b.Hope this helps if so Please consider marking brainliest!
Step-by-step explanation:
Move all terms not containing C to the right side of the equation.
c = p -9 + b
Find the y intercept for 3x+2y=21
Answer:
The y-intercept is 21/2
3x + 2y = 21
-3x
2y = 21 - 3x
/2
Y = 21/2 - 3/2x
The number with the x is the slope and the other is the y-intercept
6th grade math i mark as brainleist or whatever thats spelled
A yard stick is about how wide?
Answer:
3 feet long about 1 1\2 inch wide though
Step-by-step explanation:
.
3 feet
36 inches
0.000568182 of a mile
Long
What is the slope of the line that passes through the points 6,-2, and 12,-2kjj
which equation represents exponential decay
Answer:
You have to show the question
Step-by-step explanation:
Someone help please xxx
PLSSS HELP ME I WILL GIVE BRAINLIEST!!!!!!!!
Answer:
12x - 30
Step-by-step explanation:
Do you want 3x??
If so, here:
3(4x - 10)
12x - 30
Hope this helps!
Have a nice day!
If you fin my answer helpful
Pls consider marking my answer as Brainliest! It would mean a lot!
What is the equation for the line of reflection?
What is X? 3(-x-3)+x-3=-24
Answer:
x is equal to 6
Step-by-step explanation:
Hey there!
3(-x-3) + x-3= -24
Multiply"3" and (-x-3).
-3x - 9 + x - 3 = -24
Add or subtract like terms.
-2x - 12 = -24
Shift "-12" in right side.
-2x = -24+12
-2x = -12
Divide "-12" by "-2".
X = -12/-2
Therefore, x= 6.
Hope it helps...
Question 9 (10 points)
Find the average rate of change of the function below from x1 to X2.
f(x) = 5x +7
Step-by-step explanation:
access to one as to which the two was to wisdom 100 as wisdom teeth is my dream wall
what are 3 equivalent to the ratio to 5/7
Answer: 15/21 , 25/35 , 10/14 or 10/14, 15/21, 20/28
Step-by-step explanation:
Answer:
10/14, 15/21, 20/28
Step-by-step explanation:
Just multiply a number by the top and bottom to get a ratio that simplifies down to 5/7.
7th grade math help me plzzzz
Answer:
2.) -2 +-3 = -5
4.) -6+-10= -16
g You believe that the mean life is actually less than the 100 hours the company claims. You decide to collect data on the average battery life (in hours) of a random sample and obtain the following information: the sample mean is 98.5, the standard error of the mean is 0.777 and the number of observations is 20. What can you conclude:
Answer:
The mean life is actually less than the 100 hours the company claims.
Step-by-step explanation:
In this case we need to test whether the mean life is actually less than the 100 hours the company claims.
The information provided is:
[tex]n=20\\\bar x=98.5\\s=0.777[/tex]
The hypothesis for the test can be defined as follows:
H₀: The mean life 100 hours, i.e. μ = 100.
Hₐ: The mean life is actually less than the 100 hours, i.e. μ < 100.
Assume the significance level as 5%.
As the population standard deviation is not known we will use a t-test for single mean.
Compute the test statistic value as follows:
[tex]t=\frac{\bar x-\mu}{s/\sqrt{n}}=\frac{98.5-100}{0.777}=-1.93[/tex]
Compute the p-value of the test as follows:
[tex]p-value=P(t_{n-1}<-1.93)=P(t_{19}<-1.93)=0.034[/tex]
*Use a t-table.
Thus, the p-value of the test is 0.034.
Decision rule:
If the p-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.
p-value = 0.034 < α = 0.05
The null hypothesis will be rejected at 5% level of significance.
Thus, concluding that the mean life is actually less than the 100 hours the company claims.
PLS HELP I'LL GIVE BRAINLEST AND POINTS
The area of the base of a box is 150 square centimeters. The volume of the box is 3,300 cubic centimeters. What is the height of the box?
Answer:
the height is 22
Step-by-step explanation:
volume = base×height ×width
3,300÷150=22
then to check it u do 22×150=3,300
i think this is right and hope it helps
h(t)= 50-t/5
h(35) =
Answer:
125
Step-by-step explanation:
Answer:
h= 50 - th(35)/5
Step-by-step explanation:
30 POINTS I WILL GIVE BRAINLYIST
3. A group of workers is harvesting berries at a constant rate. An equation that represents the total number of baskets of berries the workers picked over a period of time, in hours, is y = 7x + 15.
(a) What are the slope and the y-intercept for the equation?
(b) Which term represents the total number of baskets of berries the workers picked over a period of time?
(c) What are the rate of change and the initial amount? Explain the meaning of the rate of change and the initial amount for the situation.
(d) Use graph below to draw a graph representing the situation. Label the axes appropriately.
Answer:
The answer Is B! Let me know if its wrong!
Hope you do great!
Step-by-step explanation:
Add the Polynomials
(7-7p4) + (5p4 + 7)
