Answer: 2.456 x 10^11
Step-by-step explanation:
You move the decimal to the left until there’s no more zeroes
Answer:
![Pr = \frac{1}{15}](https://tex.z-dn.net/?f=Pr%20%3D%20%5Cfrac%7B1%7D%7B15%7D)
Step-by-step explanation:
Given
See attachment for sample space
Required
![P(1\ Y\ and\ 1\ P)](https://tex.z-dn.net/?f=P%281%5C%20Y%5C%20and%5C%201%5C%20P%29)
From the attached sample space, we have:
---- total outcomes
--- outcomes with 1 Y and 1 P = 2 i.e. (P,Y) and (Y,P)
So, the required probability is:
![Pr = \frac{n(PY)}{n(S)}](https://tex.z-dn.net/?f=Pr%20%3D%20%5Cfrac%7Bn%28PY%29%7D%7Bn%28S%29%7D)
![Pr = \frac{2}{30}](https://tex.z-dn.net/?f=Pr%20%3D%20%5Cfrac%7B2%7D%7B30%7D)
![Pr = \frac{1}{15}](https://tex.z-dn.net/?f=Pr%20%3D%20%5Cfrac%7B1%7D%7B15%7D)
<em>The error is that; Carlos omitted the numerator</em>
Answer:
The expected number of children that can pass the fitness test in a test session is 7.5 and the standard deviation is 1.37.
Step-by-step explanation:
For each children, there are only two possible outcomes. Either they pass the health test, or they do not. Whether a child can pass the test is independent with the test result of other children. This means that we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
![E(X) = np](https://tex.z-dn.net/?f=E%28X%29%20%3D%20np)
The standard deviation of the binomial distribution is:
![\sqrt{V(X)} = \sqrt{np(1-p)}](https://tex.z-dn.net/?f=%5Csqrt%7BV%28X%29%7D%20%3D%20%5Csqrt%7Bnp%281-p%29%7D)
The probability for each child to pass the fitness test is 0.75
This means that ![p = 0.75](https://tex.z-dn.net/?f=p%20%3D%200.75)
10 independent children
This means that
Find the expectation and standard deviation of the number of children can pass the fitness test in a test session.
![E(X) = np = 10*0.75 = 7.5](https://tex.z-dn.net/?f=E%28X%29%20%3D%20np%20%3D%2010%2A0.75%20%3D%207.5)
![\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{10*0.75*0.25} = 1.37](https://tex.z-dn.net/?f=%5Csqrt%7BV%28X%29%7D%20%3D%20%5Csqrt%7Bnp%281-p%29%7D%20%3D%20%5Csqrt%7B10%2A0.75%2A0.25%7D%20%3D%201.37)
The expected number of children that can pass the fitness test in a test session is 7.5 and the standard deviation is 1.37.
Answer:
I disagree becuse you chould get insainly ingered or killed
Step-by-step explanation:
The race was 2.5 miles because an hour divided by 2 is 30 minutes. Therefore you have to do the same thing to the 5 and 2.5 multiplied by 2 is 5.