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antiseptic1488 [7]
3 years ago
10

Help im not good with fractions!!!

Mathematics
2 answers:
nata0808 [166]3 years ago
7 0

Answer:

2 please follow me fast and vote me

Step-by-step explanation:

2/3*3

= 6/3

= 2

almond37 [142]3 years ago
4 0
2/9 because I know that’s it
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4. In a sample of 1000 people, 130 can wiggle their ears. Two unrelated people are
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Using the hypergeometric distribution, it is found that there is a 0.7568 = 75.68% probability that neither can wiggle his or her ears.

The people are chosen from the sample without replacement, which is why the <u>hypergeometric distribution</u> is used to solve this question.

Hypergeometric distribution:

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

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

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.

In this problem:

  • 1000 people means that N = 1000
  • 130 can wiggle their ears, thus k = 130
  • Two are selected, thus n = 2.

The probability that neither can wiggle his or her ears is P(X = 0), thus:

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

P(X = x) = h(0,1000,2,130) = \frac{C_{130,0}C_{870,2}}{C_{1000,2}} = 0.7568

0.7568 = 75.68% probability that neither can wiggle his or her ears.

A similar problem is given at brainly.com/question/24826394

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How many kilometres on the ground is represented by 9 cm on the map?
Aloiza [94]

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22500

Step-by-step explanation:

You have to multiply 9 by 25000.

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What is the distance between (2, -1.2) and (2, 5.4)?​
bixtya [17]

Answer:

0,4.2

Step-by-step explanation:

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Explain how you could use a number line to determine -5 -(-3)<br><br> What is the difference?
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The difference is -2

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What does K=Y/X stand for and mean?
Mamont248 [21]

Answer:

(k = y/x) which is the constant ratio between two proportional quantities y/x denoted by the symbol k which may be a positive rational number. The x value is directly proportional to the y value such as in the equation y = kx.

Step-by-step explanation:

the meaning of it means constant of proportionality

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