<PRE><B>Question 473524</B>
a certain airplane has two independent alternatore to provide electrical power. The probability that a given alternator will fail on a one hour flight is.02.
------------
What is the probability that 
(a) both will fail:::(0.02)^2 = 0.0004
---------------------------------------------- 
(b) neither will fail::: (0.98)^2 = 0.9604
---------------------------------------------- 
(c) one or the other will fail? ::: 1-[0.0004+0.9604] = 0.0392
===================================
Cheers,
Stan H.
========================
------------------------------------------</PRE>