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Answer with Step-by-step explanation:
We are given that
Number of ace cards=3
Number of face cards=5
Number of non-face cards=11
When we draw randomly 3 cards.
Z=5(number of aces)+4(number of other face cards)
We have to determine the possible different values for the random variable Z
Number of ace cards=3, number of other face cards=0
Z=5(3)+4(0)=15
Number of ace cards=2, number of other face cards=1
[tex]z=5(2)+4(1)=14[/tex]
Number of ace card=1, number of other face cards=2
Z=5(1)+4(2)=13
Number of ace card=0, number of other face cards=3
Z=5(0)+4(3)=12
The possible values of the random variable z are:
{0, 3, 4, 6, 7, 8, 9, 10, 11, 12}
What are the possible values of Z?
Our deck has:
- 3 ace cards.
- 5 other face cards.
- 11 non face cards.
So there is a total of 19 cards.
Now we draw 3 cards, and we define the variable Z as:
Z = 3*x + 4*y
where x is the number of aces drawn, y is the number of other face cards drawn.
And the possible combinations of x and y (and the correspondent value of z) that we have are:
- x = 3, y = 0 ⇒ z = 9
- x = 2, y = 1 ⇒ z = 10
- x = 1, y = 2 ⇒ z = 11
- x = 0, y =3 ⇒ z = 12
- x = 2, y = 0 ⇒ z = 6
- x = 1, y = 1 ⇒ z = 7
- x = 0, y = 2 ⇒ z = 8
- x = 1, y = 0 ⇒ z = 3
- x = 0, y = 1 ⇒ z = 4
- x = 0, y = 0 ⇒ z = 0.
So the possible values of z are:
{0, 3, 4, 6, 7, 8, 9, 10, 11, 12}
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