An urn contains four red marbles and five blue marbles. What is the probability of selecting at random, without replacement, two red marbles?


A. 16/72


B. 20/72


C. 12/72


D. 20/81


Please show steps

Answers

Answer 1

The probability of selecting two red marbles without replacement from an urn containing four red marbles and five blue marbles is 12/72, which can be simplified to 1/6.

The probability of selecting the first red marble is 4/9 since there are four red marbles out of a total of nine marbles. After selecting the first red marble, there are now three red marbles left out of a total of eight marbles. Therefore, the probability of selecting a second red marble, without replacement, is 3/8.

To find the probability of both events occurring, we multiply the probabilities together. So the probability of selecting two red marbles without replacement is (4/9) * (3/8) = 12/72.

This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 12. Simplifying gives us 1/6.

Therefore, the correct answer is C. 12/72.

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(05.01 MC)
The graph shows the prices of different numbers of bushels of corn at a store in the
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Current Year
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Answers

PART A:

To find the rate of change, put change in y over change in x. In order to first find the changes, you must subtract two y values from each other and two x values from each other, like this:

Change in y = 20-10

Change in x = 4-2

Then you can put these over each other:

20-10/4-2

Then simplify

20-10/4-2 = 10/2 = 5/1 = 5

So, this means the rate of change is 5. $5 per bushel.

If you also need part B it would be helpful to see the other chart because it's hard to understand in the writing you included. :) Comment and let me know if you post it so I can help you out!

Part A: 7 dollars  

- The graph shows that 2 bushels is 14 dollars,  because the graph has a straight line, the rate remains constant you must divide the sides by two to find the amount for one bushel which would be 7 dollars.

- And to double check you would divide 28 by 4, 42 by 6, 56 by 8, 70 by 10, 84 by 11, and 98 by 12. they all equals 7 dollars So, the equation would be y = 7x.

- 7 can be known as the slope and  rate of change.

Part B:2 dollars

- The years before show 2 bushes was 10 dollars

-so you would divide 10 by two you would get five  To double check you would do the same thing with 20 by 4, 30 by 6 and 40 by 8, and they all equal 5 dollars.

-if you use this answer be sure to reword it so you dont get copy write and integrity. have a great day or night.

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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Answers

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Step-by-step explanation:

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Answers

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The area of the garden that is grass is 30 square meters.

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to complete the equation and
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Answers

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Answers

The question is incomplete. Here is the complete question.

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Answers

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Step-by-step explanation:

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Answers

Answer:

the number is 4x - 7

Step-by-step explanation:

Let P be subtracted from -5x - 8 to make it equivalent to -9x - 1.

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make "-P" the subject of the formula

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Collect like terms;

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Please Help!

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Answers

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Check:
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Answer:

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Step-by-step explanation:

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Disclaimer: Yay, okay. The person above me got the same answer so this is right.

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