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GarryVolchara [31]
3 years ago
5

A card is drawn at random from a standard 52-card deck. Find the probability it is a king or black card

Mathematics
1 answer:
Strike441 [17]3 years ago
4 0

Answer:the probability of getting just a king is 1/13 the probability that it is a black is 1/2 and a probability that it is a black king is 1/26

Step-by-step explanation:

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EastWind [94]

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 We are looking for this :

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8 0
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zlopas [31]

Answer:

In between 4 and 6

Step-by-step explanation:

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Oduvanchick [21]

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Step-by-step explanation:

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3 years ago
Read 2 more answers
Using Cramer’s Rule, what is the value of x in the system of linear equations below? x+3y=16 3x+y=8
alexdok [17]
Cramer's rule works as follows:
x+3y=16
3x+y=8
Then 
x=Dx/D
y=Dy/D
where Dx,Dy,D are 2x2 matrices formed from of coefficients and right hand side.
D=
1 3
3 1
=1-9=-8
Dx=matrix D with first column replaced by the vector [16,8]=
16,3
8 1
=16-24
=-8

Dy=matrix D with second column replaced by the vector [16,8]=
1 16
3 8
=8-48
=-40

Therefore
x=-8/-8=1
y=--40/-8=5

Check:
x+3y=1+3(5)=16
3x+y=3(1)+5=8   ok.
4 0
3 years ago
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