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2 years ago

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someone pls help me :Jada and her sister went to the store together. After the store, Jada walked 9 blocks west to get a coffee

and her sister walked 6 blocks west back to work. How many blocks is the coffee shop that Jada went to from her sister's work?

2 answers:

Musya8 [376]2 years ago

3 0

Answer:

3 blocks away from Jada's sister's work.

Nikolay [14]2 years ago

3 0

Answer:

3 blocks

Step-by-step explanation:

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Naval intelligence reports that 4 enemy vessels in a fleet of 17 are carrying nuclear weapons. If 9 vessels are randomly targete

icang [17]

Answer:

0.7588 = 75.88% probability that more than 1 vessel transporting nuclear weapons was destroyed

Step-by-step explanation:

The vessels are destroyed without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

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

In which:

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.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

In this question:

Fleet of 17 means that $N = 17$

4 are carrying nucleas weapons, which means that $k = 4$

9 are destroyed, which means that $n = 9$

What is the probability that more than 1 vessel transporting nuclear weapons was destroyed?

This is:

$P(X > 1) = 1 - P(X \leq 1)$

In which

$P(X \leq 1) = P(X = 0) + P(X = 1)$

So

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

$P(X = 0) = h(0,17,9,4) = \frac{C_{4,0}*C_{13,9}}{C_{17,9}} = 0.0294$

$P(X = 1) = h(1,17,9,4) = \frac{C_{4,1}*C_{13,8}}{C_{17,9}} = 0.2118$

Then

$P(X \leq 1) = P(X = 0) + P(X = 1) = 0.0294 + 0.2118 = 0.2412$

$P(X > 1) = 1 - P(X \leq 1) = 1 - 0.2412 = 0.7588$

0.7588 = 75.88% probability that more than 1 vessel transporting nuclear weapons was destroyed

8 0

2 years ago

I dont understand this equation.

amm1812

Where is the question and what is it?

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What is X for? x+20=35-4x

Helen [10]

X+4x=35-20. 5x=35-20. 5x=15. X=3

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3 years ago

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For which equation is x = 9 a solution? A. 3x – 7 = –34 B. x – 9 = 1 C. 2003-05-02-00-00_files/i0020000.jpg D. 4x + 5 = 41

Monica [59]

X=9

A) 3x-7=34
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B) x-9=1
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C) dude what is this

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3 years ago

Events X and Y are independent. The probability of X occurring is 1/3 . The probability of Y occurring is 1/2 . What is P(X and

Step2247 [10]

For independent events $X,Y$ , $\mathbb P(X\cap Y)=\mathbb P(X)\times\mathbb P(Y)$ .

So

$\mathbb P(X\cap Y)=\dfrac13\times\dfrac12=\dfrac16$

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3 years ago

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