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aksik [14]
3 years ago
9

A bag contains 3 red and 6 white tokens. Tokens are randomly selected and removed one at a time until the bag is empty. Find the

probability that the red tokens are drawn consecutively.
Mathematics
1 answer:
disa [49]3 years ago
4 0

Answer:

Therefore, the probability is P=1/84.

Step-by-step explanation:

We have a  bag contains 3 red and 6 white tokens. Tokens are randomly selected and removed one at a time until the bag is empty.

We conclude that in a bag have 9 tokens.  

We calculate the probability that the red tokens are drawn consecutively.

We calculate the number of possible combinations:

C_3^9=\frac{9!}{3!(9-3)!}=84\\\\

Number of favorable combinations is 1.

Therefore, the probability is P=1/84.

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Solve x2 + 4x – 4 = 0
Damm [24]

Answer:

Quadratic Equations! Yes!

Step-by-step explanation:

Now, there are three methods to solving this:

1.Quadratic Formula

2.Factoring

3. Completing the square

Now, Based on the answers, I think it would be better if we used Quadratic Formula, as you cannot get the answer easily with factoring, and I'm a bit rusty on completing the square.

So, Quadratic Formula! To solve it using this method, we have to find x using this: x=\frac{-b+-\sqrt{b^{2} -4ac} }{2a}(the +- before the square root means it could be both positive or negative)

Where a, b are coefficients and c is a term(in a quadratic equation form: ax^{2} +bx+c=0)

So, we just have to input the stuff from our equation into the formula!

x=\frac{-4+-\sqrt{32} }{2}

Now, we can simplify the square root of 32 into 4 times the square root of 2

x=\frac{-4+-4\sqrt{2} }{2}

And, we can divide 2 from it all!

x=-2+-2\sqrt{2}

So, there you have it! The Answer is C, or 3.

Hope this helps!

4 0
3 years ago
HELPPPP PLEASE!!!!!!
worty [1.4K]

Answer:

<h3>y = 20</h3><h3 />

Step-by-step explanation:

line RPN = 180 = 4y - 10 + 90 + y

180 - 90 + 10= 5y

100 = 5y

y = 100/5

y = 20

7 0
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Zoom in to view well <br> Thanks
Step2247 [10]

Answer:

the answer is c. ........

8 0
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Answer:

A

Step-by-step explanation:

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3 years ago
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omeli [17]
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7 0
4 years ago
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