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3 years ago

Can you help me with plz?

Mathematics

2 answers:

Ann [662]3 years ago

4 0

Answer:

Step-by-step explanation:

you would choose c because those people are leaving at the end of the day which means they are not going to practice for anything. All of the others wouldnt be because the girls soccer team like soccer, the band is a concentrated group and the people at the stadium obviously like football the most so c would have the largest variety of people.

belka [17]3 years ago

3 0

i think the answer is C

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Firstly, we can convert all of the fractions into percentages. To do this, we need to make the denominator of the fraction 100, and whatever we do to the denominator we must also do to the numerator.

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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".

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

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

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

Solution to the problem

For this case we want to find this probability:

$P(X \geq 8)= P(X=8) +P(X=9) +P(X=10)$

And we can find the individual probabilities like this:

$P(X=8)=(10C8)(0.65)^0 (1-0.65)^{10-8}=0.176$

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And adding we got:

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<em>Answer</em>

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