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2 years ago

What is the value of b in the equation 2x-y=6

Mathematics

1 answer:

andriy [413]2 years ago

4 0

Answer:

are you sure its b? b doesnt seem to be present in 2x-y=6

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Find the probability of at least 6 failures in 7 trials of a binomial experiment in which the probability of success in any one

oksano4ka [1.4K]

Answer:

$P(x \geq 6)=P(X=6)+P(X=7)$

And we can find the individual probabilities:

$P(X=6)=(7C6)(0.91)^6 (1-0.91)^{7-6}=0.358$

$P(X=7)=(7C7)(0.91)^7 (1-0.91)^{7-7}=0.517$

And replacing we got:

$P(x \geq 6)=P(X=6)+P(X=7)= 0.358+0.517=0.875$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=7, p=1-0.09=0.91)$

The probability associated to a failure would be p =1-0.09 = 0.91

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:

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

And we want to find this probability:

$P(x \geq 6)=P(X=6)+P(X=7)$

And we can find the individual probabilities:

$P(X=6)=(7C6)(0.91)^6 (1-0.91)^{7-6}=0.358$

$P(X=7)=(7C7)(0.91)^7 (1-0.91)^{7-7}=0.517$

And replacing we got:

$P(x \geq 6)=P(X=6)+P(X=7)= 0.358+0.517=0.875$

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3 years ago

For a triangle to be classified as equilateral, what must all three angles measure? Do not include the degree symbol in your

OleMash [197]

Answer:

I think the answer is 60.

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3 years ago

One way to convert from inches to centimeters is to multiply the number of inches by 2.54. How many centimeters are there in 1/4

NikAS [45]

Answer:

0.635

Step-by-step explanation:

1/4 x 2.54 = 0.635

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3 years ago

Read 2 more answers

A bicycle that normally sells for $180 is on sale for 40% off. What is the

Kitty [74]

Answer:

$108 i think

Step-by-step explanation:

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3 years ago

The triangle will be dilated by a scale factor of 1.5. (a) Calculate the length of each side of the dilated image. (b) Draw the

VLD [36.1K]

To find the new sides take the original sides and multiply it by the scale factor

12 * 1.5 = 18
10 * 1.5 = 15
14 * 1.5 = 21

So the new sides are 18, 15, 21. And they correspond to the 12, 10, and 14 respectively

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3 years ago