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3 years ago

What's the chance of NOT rolling a seven using a pair of dice.

Mathematics

1 answer:

Gemiola [76]3 years ago

7 0

Answer:

5/6

Step-by-step explanation:

total possible = 36

Favorable = 6

1 6

6 1

2 4

4 2

3 4

4 3

Part/whole

6/36

= 1/6

NOT = 5/6

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What two ratios are equivalent to 10:18

Whitepunk [10]

10 : 18 2 into 10 is 5, 2 into 18 is 9.

5 : 9.

You can also choose to multiply 10 : 18 by 2.

2*10 : 2*18

20 : 36.

Therefore 5 : 9 and 20 : 36 are two ratios that are equivalent to 10 : 18.

6 0

4 years ago

Read 2 more answers

There are 21 groups of 3 in a room. How many people are there. I need an equation

Mars2501 [29]

Y = 3(21)

21 would be x

4 0

3 years ago

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To convert a distance of 13,000 feet to miles, which ratio could you multiply<br> by?

Oxana [17]

Answer:

1 mile

----------

5280 feet

Step-by-step explanation:

There are 5,280 feet in one mile, so to convert it, multiply by ^

4 0

3 years ago

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4. In a sample of 1000 people, 130 can wiggle their ears. Two unrelated people are

Elina [12.6K]

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

5 0

2 years ago

Each month, the census bureau mails survey forms to 250,000 households asking questions about the people living in the household

allsm [11]

Answer:

Option D is correct. All US households are among the population of interest.

Step-by-step explanation:

The Census bureau is a national body in the U.S. and they do the survey of 250000 different households monthly. The surveys go out to all corners of the U.S. depending on which part of the nation is doing the survey next.

It shows that the entire U.S. population is of interest to the census bureau.

5 0

3 years ago