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Mamont248 [21]
2 years ago
8

Can someone help me with this:

Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
8 0

Answer:

F (-8, -1)

Step-by-step explanation:

We can solve the system using substitution.

From the second equation

x-6y= -2

x= -2 + 6y

This value of x substitute into 1st equation

-4x+5y=27

-4(-2+6y)+5y=27

 8-24y+5y =27

- 19y = 19

    y= -1

x= -2 + 6y, y= - 1

x= -2 +6(-1)= -8

x= - 8

x= -8, y= -1

(-8, -1)

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Answer:

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Step-by-step explanation:

Previous concepts

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Where (nCx) means combinatory and it's given by this formula:  

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Solution to the problem

We assume that we have a fair coin that is p(Head)=p(Tails)=0.5

For this case we define the random variable X as "number of heads observed in 20 times". The distribution for X is given by:

X \sim Binom(n=20, p=0.5)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

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