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andreev551 [17]
3 years ago
12

According to a recent survey, 50% of people aged 13 and older in the United States are addicted to texting. To simulate choosing

a random sample of 20 people in this population and seeing how many of them are addicted to texting, use a deck of cards. Shuffle the deck well, and then draw one card at a time. A red card means that person is addicted to texting; a black card means he isn’t. Continue until you have drawn 20 cards (without replacement) for the sample.
Mathematics
1 answer:
NeX [460]3 years ago
3 0

Answer:

It is not valid 49.02% instead of 50%

Step-by-step explanation:

If you don't replace the cards,the probability of obtaining a person that is addicted to email is no longer 50% after the first drawn card.

If you drawn a red card there are 25 red cards and 26 black cards then the probability of 25/25+26=25/51 ≅0.4902 = 49.02 instead of 50%

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Movie tickets cost 16$ for two people how much would 8 tickets cost at the same rate
lesya692 [45]

Answer:

64

Step-by-step explanation:

because each ticket cost 8 dollars you would then multiply it by 8

7 0
3 years ago
Read 2 more answers
Intc
ivanzaharov [21]

We are required to find the cost of each cherry tree and rose bushes.

The cost of each cherry tree, x is $8 and the cost of each rose bushes, y is $12

let

<em>cost of each cherry tree = x</em>

<em>cost of each cherry tree = xcost of each rose bushes = y</em>

The equation:

7x + 11y = 188 (1)

13x + 11y = 236 (2)

Subtract (1) from (2) to eliminate y

13x - 7x = 236 - 188

6x = 48

divide both sides by 6

x = 48 / 6

x = 8

substitute x = 8 into (1)

7x + 11y = 188 (1)

7(8) + 11y = 188

56 + 11y = 188

11y = 188 - 56

11y = 132

divide both sides by 11

y = 132 / 11

y = 12

Therefore, the cost of each cherry tree, x is $8 and the cost of each rose bushes, y is $12

Read more:

brainly.com/question/15165519

8 0
2 years ago
Not sure how to solve this
Margarita [4]

Answer:

-3/17

Step-by-step explanation:

(7,1) and (-10,4)

slope formula: m = (y₂ - y₁) / (x₂ - x₁)

plug in data: m = (4 - 1) / (-10 - 7)

solve: 3 / -17

simplify: -3/17 (written as a fraction)

8 0
3 years ago
On Friday 2/5 of the students wore blue shirts and 5/12 wore white shirts . What fraction of students wore either a blue shirt o
mario62 [17]
2/5=24/60 because you have to make the denominators the same in order to do the problem. Which means... 5/12=25/60 Afterwards just add them together. 24/60 + 25/60 which equals 49/60. You can't simplify so the answer is 49/60 students.
7 0
3 years ago
The lines a and b intersect at point D.<br><br> What is the value of z?
MrRissso [65]

Answer:

The value of the z is 12 .

Step-by-step explanation:

Definition of vertically opposite angle .

Vertically opposite angles is defines angles opposite to each other when two lines cross eachother .

Thus

(5z + 8)° = (4z + 20)°

(5z + 8) = (4z + 20)

Open the bracket

5z + 8 = 4z + 20

5z -  4z = 20 -8

z = 12

Therefore the value of the z is 12 .


5 0
3 years ago
Read 2 more answers
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