<PRE><B>Question 135272</B>
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?) 
P(fail AND fail) = 0.02*0.02 = 0.0004
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(b) Neither will fail? 
P(not fail AND not fail) = 0.98*0.98 = 0.9604
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(c) One or the other will fail? 
Prob(one or other fail) = 1 - (0.9604+0.0004) = 0.0392
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Cheers,
Stan H.</PRE>