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3 years ago

3x=5*9 you have to multiply the numbers

Mathematics

2 answers:

myrzilka [38]3 years ago

8 0

Answer:

15 is the multiply of the number

Dvinal [7]3 years ago

7 0

5*9= 50
3x=50
16.67

i’m sure this is the right answer

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In a list of households, own homes and do not own homes. Five households are randomly selected from these households. Find the p

Paladinen [302]

Answer:

The probability of success for this case would be:

$p =\frac{9}{15}= 0.6$ representing the proportion of homes that are own homes

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

$X \sim Binom(n=15, p=0.6)$

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 this probability:

$P(X=3)$

And uing the probability mass function we got:

$P(X=3)= 15C3 (0.6)^3 (1-0.6)^{15-3}= 0.00165$

Step-by-step explanation:

Adduming the following info: In a list of 15 households, 9 own homes and 6 do not own homes. Five households are randomly selected from these 15 households. Find the probability that the number of households in these 5 own homes is exactly 3.

Round your answer to four decimal places

P (exactly 3)=

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

The probability of success for this case would be:

$p =\frac{9}{15}= 0.6$ representing the proportion of homes that are own homes

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

$X \sim Binom(n=15, p=0.6)$

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 this probability:

$P(X=3)$

And uing the probability mass function we got:

$P(X=3)= 15C3 (0.6)^3 (1-0.6)^{15-3}= 0.00165$

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4 years ago

Read 2 more answers

Sandy adds $4 to a certain amount of money she already has saved. Kyle already has 10 times as much money as sandy has saved but

Nonamiya [84]

Answer:

Step-by-step explanation:

Sandy adds $4 to a certain amount of money she already has saved.

Let the amount she has saved be x.

=> x + 4

Kyle already has 10 times as much money as sandy has saved (10x) but then spends 14$ dollars of his savings.

=> 10x - 14

They both have the same amount of money now:

=> 10x - 14 = x + 4

To get x, collect like terms and simplify:

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This means that Sandy had already saved $2.

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