document.write( "Question 1172383: Two game tiles, numbered 1 through 9, are selected at random from a box without replacement. If their sum is even, what is the probability that both numbers are odd? \n" ); document.write( "

Algebra.Com's Answer #797404 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "If their sum is even, it means that EITHER both numbers are odd OR both numbers are even.\r\n" );
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document.write( "Among the numbers 1 to 9 inclusive, there are 5 odd and 4 even numbers.\r\n" );
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document.write( "So,  P(the sum is even) = P(both are odd) + P(both are even) =  =  = .    \r\n" );
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document.write( "From the other hand side,  P(both are odd) =  = .\r\n" );
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document.write( "Therefore, the conditional probability that both numbers are odd, given that their sum is even, is equal to\r\n" );
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document.write( "    P(final) =  =  =  = .    ANSWER\r\n" );
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