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julia-pushkina [17]
3 years ago
15

Suppose you participate in a chess tournament in which you play n games. In each game, you are equally likely to win, lose, or t

ie, and the outcome of each game is independent of the outcome of every other game. You collect 2 points for each win, 1 point for each tie, and 0 points for each loss. Let Y be the total number of points earned over the n games. Find E[Y ] and Var[Y ].
Mathematics
1 answer:
Zepler [3.9K]3 years ago
4 0
Yttgbsasjknvsefhk cased
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A bag contains 4 tan socks and 7 grey socks. emily reaches into the bag and randomly selects two socks without replacement. what
Y_Kistochka [10]
Tan socks = 4
Grey socks = 7
Total number of socks = 4+7 = 11 socks
Probability of picking a tan sock then grey sock:
P(T)*P(G) = (4/11)*(7/10) = 14/54

Probability of picking a Grey sock then Tan sock
P(G)*P(T) = (7/11)*(4/10) = 14/55

Probability of two different colored socks
P(T&G)+P(G&T) = (14/55)+(14/55) = 28/55
8 0
3 years ago
Please help me with this problem look at image
matrenka [14]

Answer:

Value of p is 11 and value of q is -11 .

Step-by-step explanation:

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4 0
2 years ago
sphere a has radius 4 and a hemisphere b has a radius 8. fin the ratio of the volume of A to the volume of b
salantis [7]

Answer:

A/B = 0.125

Step-by-step explanation:

Givens

r for Sphere A = 4

r for Sphere B = 8

Solution

Volume A = 4/3 pi r^3

r = 4

Volume A = 4/3 pi 4^3

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Note: there is no point in expanding the result. 4/3 and pi are going to cancel out when you set up the volume formula

Volume B = 4/3 pi * r^3

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Volume B = 4/3 pi * 8^3

Volume B = 4/3 pi * 512

Ratio A to B = 4/3 pi * 64 / 4/3 * pi * 512        Cancel 4/3 pi

Ratio A to B = 64/512

Ratio A to B = 1/8

Ratio A to B = 0.125

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2 years ago
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3 years ago
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Write an addition problem that is equivalent to -5- (-8)
Ray Of Light [21]

Answer:

I don't know if I understood correctly but here is the answer I think could be right.

-5-(-8)=3

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6 0
2 years ago
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