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2 years ago

Evaluate 3^2 + (8 - 2) x 4 - 6/3

Mathematics

2 answers:

labwork [276]2 years ago

4 0

3^2 + (8 - 2) x 4 - 6/3

=9 + 24 - 2

=33 - 2

=31

NARA [144]2 years ago

4 0

Answer: 31

("x" = * right? not x)

Step-by-step explanation:

$3^{2}$ +(8-2) * 4 - $\frac{6}{3}$

= 9+6 * 4 - 6/3

= 9+24 - 6/3

= 9+24-2

= 31

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Answer:

a) $X \sim Binom(n=16, p=0.2)$

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:

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

The expected value is given by this formula:

$E(X) = np=16*0.2=3.2$

b) $P(X=0)=(16C0)(0.2)^{0} (1-0.2)^{16-0}=0.02815$

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".

Part a

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

$X \sim Binom(n=16, p=0.2)$

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:

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

The expected value is given by this formula:

$E(X) = np=16*0.2=3.2$

Part b

For this case we want this probability:

$P(X=0)$

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 using this function we got:

$P(X=0)=(16C0)(0.2)^{0} (1-0.2)^{16-0}=0.02815$

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3 years ago

Read 2 more answers

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Andreas93 [3]

Answer:

i think it's C

Step-by-step explanation:

process of elimination

Hope this helps my dude! :- )

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2 years ago

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Given:
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2 years ago

Tony separates a number of paintbrushes, x, into 3 equally sized groups. He claims that this is the same as making a group 1/3 t

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Answer:

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Step-by-step explanation:

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