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prisoha [69]
3 years ago
15

24) A bag contains 18 balls: two green, five black, eight blue, a brown, a red and one white. If 17 balls are removed from the b

ag at random, what is the probability that
a brown ball has been removed? And why?
A. 1/2
B. 1/9
C. 1/6
D. 16/11
E. 17/18
Mathematics
1 answer:
konstantin123 [22]3 years ago
8 0
I’m not sure but maybe D
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Suppose I have an urn with 9 balls: 4 green, 3 yellow and 2 white ones. I draw a ball from the urn repeatedly with replacement.
Mrrafil [7]

Answer:

E(X_n)=\frac{2(n-1)}{27}

E(y)=\frac{14}{9}

Step-by-step explanation:

From the question we are told that:

Sample size n=9

Number of Green g=4

Number of yellow y=4

Number of white w=4

Probability of Green Followed by yellow P(GY) ball

 P(GY)=\frac{4}{9}*\frac{3}{9}

 P(GY)=\frac{4}{27}

Generally the equations for when n is even is mathematically given by

 Probability of success P(S)=\frac{4}{27}

 Probability of Failure P(F)=\frac{27-4}{27}

 Probability of Failure P(F)=\frac{23}{27}

Therefore

 E(X_n)=\frac{n}{2}*P

 E(X_n)=\frac{n}{2}*\frac{4}{27}

 E(X_n)=\frac{2n}{27}

Generally the equations for when n is odd is mathematically given by

 \frac{n-1}{2}

 E(X_n)=\frac{n-1}{2}*\frac{4}{27}

 E(X_n)=\frac{2(n-1)}{27}

b)

Probability of drawing white ball

 P(w)=\frac{2}{9}

Therefore

 E(w)=\frac{1}{p}

 E(w)=\frac{1}{\frac{2}{9}}

 E(w)=\frac{9}{2}

Therefore

 E(y)=[E(w)-1]\frac{4}{9}

 E(y)=[\frac{9}{2}-1]\frac{4}{9}

 E(y)=\frac{14}{9}

5 0
3 years ago
What is the slope of the line that
lutik1710 [3]

Answer:

2

Step-by-step explanation:

We can use the slope formula

m = ( y2-y1)/(x2-x1)

m = ( 8-2)/(3-0)

   = 6/3

   = 2

7 0
3 years ago
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List the following numbers from greatest to least: -5, 4, 0, |-3|, -6, 2<br><br> 6th grade integers
strojnjashka [21]

Answer:

4, 2, |-3|, 0, -5, -6

Step-by-step explanation:

7 0
3 years ago
Jena lives 1 mile from the school. She rides her bike at a speed of 4 miles per hour. If she leaves school at 2:30 p.m., what ti
Finger [1]

Answer:

I believe it's A

Step-by-step explanation:

Hope this helps!

8 0
2 years ago
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Let ​ x² + 15x = 49 .​ What values make an equivalent number sentence after completing the square? Enter your answers in the box
Pavlova-9 [17]

Answer:

Step-by-step explanation:

15/2 = 7.5 and (7.5)^2 = 56.25  so

x^2 + 15x + 56.25 = 49 + 56.25

x^2 + 15x + 56.25 = 105.25.

5 0
3 years ago
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