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Lesechka [4]
3 years ago
8

We will flip a balanced coin 3 times and for each toss, record whether we get a Head or a Tail. Write all possible outcomes of t

his experiment to find the probability that we get exactly 1 tail.
a. 2/3
b. 1/8
c. 1/3
d. 3/8
Mathematics
1 answer:
Mandarinka [93]3 years ago
4 0

Answer: A- 2/3

Step-by-step explanation:

Possible outcomes when a coin is tossed 3 times is 1/2 + 1/2+ 1/2= 3/2

Probability of getting exactly one tail=

3/2x=1

x=1÷3/2

=1 ×2/3

=2/3

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Help picture below problem 12
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Answer:

124°

Step-by-step explanation:

Not the best at explaining but should be equal to 180 straight across. You have to find the missing angle. You know the right angle is 90° so you will add 34° to get 124°. 180-124 will get you 56°. Straught across you have the angle that you are trying to find which is 124° because 180-56 is 124.

8 0
2 years ago
4 • 4 • 4 • 4 • 4 • 4 • 4 = 47
Virty [35]

Answer: I think the answer is 16384!

Step-by-step explanation:

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Deffense [45]

Answer:

Given:

- angle: E

- opposite-leg : 3

- adjacent - leg: 4

- hypotenuse: 5

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Step-by-step explanation:

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3 years ago
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Suppose that X is a random variable with mean 30 and standard deviation 4. Also suppose that Y is a random variable with mean 50
Vladimir79 [104]

Answer:

a) Var[z] = 1600

    D[z] = 40

b) Var[z] = 2304

    D[z] = 48

c) Var[z] = 80

    D[z] = 8.94

d) Var[z] = 80

    D[z] = 8.94

e) Var[z] = 320

    D[z] = 17.88

Step-by-step explanation:

In general

V([x+y] = V[x] + V[y] +2Cov[xy]

how in this problem Cov[XY] = 0, then

V[x+y] = V[x] + V[y]

Also we must use this properti of the variance  

V[ax+b] = a^{2}V[x]

and remember that

standard desviation = \sqrt{Var[x]}

a) z = 35-10x

   Var[z] = 10^{2} Var[x] = 100*16 = 1600

   D[z] = \sqrt{1600} = 40

b) z = 12x -5

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   D[z] = \sqrt{2304} = 48

c) z = x + y

   Var[z] =  Var[x+y] = Var[x] + Var[y] = 16 + 64 = 80

   D[z] = \sqrt{80} = 8.94  

d) z = x - y

   Var[z] =  Var[x-y] = Var[x] + Var[y] = 16 + 64 = 80

   D[z] = \sqrt{80} = 8.94

e) z = -2x + 2y

   Var[z] = 4Var[x] + 4Var[y] = 4*16 + 4*64 = 320

  D[z] = \sqrt{320} = 17.88

   

7 0
3 years ago
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serg [7]

Answer:

x = { - 1, 0,1 ,2  ...}

Step-by-step explanation:

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Hope this helps ;) ❤❤❤

6 0
3 years ago
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