Given that 2P(X=x1)=3P(X=x2)=P(X=x3)=5P(X=x4)
Let 2P(X=x1)=3P(X=x2)=P(X=x3)=5P(X=x4)=k
Expressing each probability in terms of k:
P(X=x1)=2k
P(X=x2)=3k
P(X=x3)=k
P(X=x4)=5k
Since all probabilities must sum to 1:
P(X=x1)+P(X=x2)+P(X=x3)+P(X=x4)=1
2k+3k+k+5k=1
Finding common denominator (LCM of 2, 3, 1, 5 is 30):
3015k+3010k+3030k+306k=1
3015k+10k+30k+6k=1
3061k=1
k=6130
Substituting k=6130:
P(X=x1)=2k=6130×21=6115
P(X=x2)=3k=6130×31=6110
P(X=x3)=k=6130
P(X=x4)=5k=6130×51=616
The probability distribution of X is:
| X | x1 | x2 | x3 | x4 |
|---|
| P(X) | 6115 | 6110 | 6130 | 616 |