Kizspy | Question: 26
(Choose 1 answer)
(See picture)
A. (i)
B. (ii)
C. (iii)
D. (iv)
FUOVERFL
Let c be the number such that f(x,y)=c(x+y) is the joint probability distribution of two discrete random variables X and Y, where x=1,2,3,4 and y=0, 1, 2. Describe the marginal probability distribution of X.
X
1
(i) P(X=k) 6c
X
10c
1
14c
1
12c
3
18c
4
22c
3 4
15c 18c
(ii)
P(X=k)
X
1
P(X=k) 9c
X
1
(iii)
2
7c
3 4
(iv)
P(X=k) 3c
2
9c
3 4
12c 15c
2
11c 15c
