janemorales
Jul 20, 2008, 04:09 PM
Did I do this right?
5.62 – A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1 – hour flight is .02. What is the probability that (a) both will fail? (b) neither will fail? (c) one or the other will fail? Show all steps carefully.
(a) – P(F) x P(F) = .02 x .02 = .0004 both will fail
(b) – (1-P(F)) x (1-P(F)) = .98 x .98 = .9604 neither will fail
(c) – 1 - .9604 = .0396 one will fail
5.62 – A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1 – hour flight is .02. What is the probability that (a) both will fail? (b) neither will fail? (c) one or the other will fail? Show all steps carefully.
(a) – P(F) x P(F) = .02 x .02 = .0004 both will fail
(b) – (1-P(F)) x (1-P(F)) = .98 x .98 = .9604 neither will fail
(c) – 1 - .9604 = .0396 one will fail