SOLUTION: The probability of a man to live 20 more years is X and the probability of his wife to live 20 more years is Y. 1) find the probability of both to live 20 more years. 2) find the

Algebra ->  Probability-and-statistics -> SOLUTION: The probability of a man to live 20 more years is X and the probability of his wife to live 20 more years is Y. 1) find the probability of both to live 20 more years. 2) find the      Log On


   

Question 1105633: The probability of a man to live 20 more years is X and the probability of his wife to live 20 more years is Y.
1) find the probability of both to live 20 more years.
2) find the probability of at least one person to live 20 more years.
3) find the probability of only the man to live 20 more years
Found 2 solutions by rothauserc, ikleyn:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
1) X * Y
:
2) X + Y
:
3) X
:

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
1)  1 - (1-X)*(1-Y) = X + Y - XY.


2)  X*(1-Y) + Y*(1-X) = X + Y - 2*XY.


3)  X*(1-Y).