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3 years ago

What is the measure of angle x? X= ?

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1 answer:

xeze [42]3 years ago

4 0

Because these are all congruent, and they're all vertical angles, this would show you that what ever you would do to one side, you do also to the other side.

(56+41)= (97).

Then we do, 180-97= (83).

$\left[\begin{array}{ccc}\boxed{\bfx=83}}\end{array}\right]$

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In a study of helicopter usage and patient survival, among the 56,074 patients transported by helicopter, 235 of them

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Using the hypergeometric distribution, it is found that the probability is 0.845 = 84.5%.

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The patients are chosen from the sample without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

The parameters are:

x is the number of successes.
N is the size of the population.
n is the size of the sample.
k is the total number of desired outcomes.

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56074 patients, thus $N = 56074$
Sample of 40, thus, $n = 40$
235 left against medical advice, thus, $k = 235$ .

The probability that none left against medical advice is P(X = 0), so:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 0) = h(0,56074,40,235) = \frac{C_{235,0}*C_{55839,40}}{C_{56074,40}} = 0.845$

The probability is 0.845 = 84.5%.

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