document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=421281>Question 421281</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 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. </SPAN>\n" );
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document.write( "probability of fail = 0.02 = 2/100 \r<BR>\n" );
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document.write( "probability of not fail = 1 / 2/100 = 98/100\r<BR>\n" );
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document.write( "(A) both will fail = 2/100 * 2/100 = 4/10000 \r<BR>\n" );
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document.write( "(b)  neither will fail = 98/100 * 98/100 \r<BR>\n" );
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document.write( "(c) one or other will fail = 2/100 * 98/100 + 98/100 * 2/100 \r<BR>\n" );
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document.write( "= 392/10000 \r<BR>\n" );
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