document.write( "Question 1163615: The probability that a certain type of machine will broke down in the first month of operation is 0.1. If a firm has two such machines which are installed at the same time, find the probability that, at the end of first month, just one has broken down \n" ); document.write( "

Algebra.Com's Answer #787753 by ikleyn(52847) $\"\"$ $\"About$

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document.write( "    P = P(A is broken, B is not) + P(B is broken, A is not) = 0.1*(1-0.1) + 0.1*(1-0.1) = 2*0.1*0.9 = 0.18.    ANSWER\r\n" );
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