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yuradex [85]
3 years ago
11

An urn contains 7 red marbles and 3 white marbles. three marbles are drawn from the urn one after the other. find the probabilit

y that the first two are red and the third is white.
Mathematics
1 answer:
vaieri [72.5K]3 years ago
5 0

7+3 = 10 total marbles

 1st pick = 7/10 for a red one

2nd pick = 6/9 reduces to 2/3 for a red one

3rd pick = 3/8 for a white one

7/10 x 2/3 =14/30 reduces to 7/15

7/15 x 3/8 = 21/120 reduces to 7/40

 probability = 7/40

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The percentage is  83%

Step-by-step explanation:

Generally R-Sq is known as the coefficient of  determination and from the question the value is  83% and this R-Sq defines  the total variation in test scores can be explained by the linear relationship between years of study and test scores

So  83 % of the total variation in test scores is unexplained by the linear relationship between years of study and test scores

8 0
4 years ago
Is the equation linear and if it is linear is it proportional?<br> y=x +31
Natasha_Volkova [10]

Answer:

yes, its linear and proportional .

Step-by-step explanation:

In mathematics, two varying quantities are said to be in a relation of proportionality, if they are multiplicatively connected to a constant, that is, when either their ratio or their product yields a constant. The value of this constant is called the coefficient of proportionality or proportionality constant.

you just have to graph it .

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7 0
3 years ago
Eight ounces of Ground beef are needed to make one hamburger. If one package of ground beef contains 12 pounds how many hamburge
DedPeter [7]

Answer:

1 1/2

Step-by-step explanation:

set up a proportion:

<u> 8 </u> = <u> 12 </u>

1        x

cross-multiply:  8x = 12

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3 0
3 years ago
A) What is the conjugate of (2+6i) <br>b) Multiply (2+6i) and its conjugate.<br> (Show working)​
Lunna [17]

Answer:

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Step-by-step explanation:

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6 0
2 years ago
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Sergio [31]

Answer:

(- 16.7, 5.2 )

Step-by-step explanation:

let the coordinates of the endpoint be (x , y )

using the midpoint formula

consider the x- coordinate

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x + 1. 7 = - 7.5 ( subtract 1.7 from both sides )

x = - 16.7

consider the y-coordinate

\frac{1}{2}(y - 4.6 ) = 0.3 ( multiply both sides by 2 )

y - 4.6 = 0.6 ( add 4.6 to both sides )

y = 5.2

endpoint = (- 16.7, 5.2 )


3 0
4 years ago
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