document.write( "Question 1152534: At a scientific congress, 85% of participants speak english (A), 35% speak french (F) and 25% speak both of these languages. If we randomly chose a congressman, what would be the probability of him being able to speak English or French? \n" ); document.write( "

Algebra.Com's Answer #774572 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "Use the general formula of the probability theory\r\n" );
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document.write( "    P(A U B) = P(A) + P(B) - P(A and B).\r\n" );
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document.write( "In your case it takes the form\r\n" );
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document.write( "    P(English or French) = P(English) + P(French) - P(English and French) = 0.85 + 0.35 - 0.25 = 0.95 = 95%    ANSWER\r\n" );
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