document.write( "Question 1176343: If P(E) = 0.40, P(EorF) = 0.50 , and P(E and F)=0.10 , find P(F) \n" ); document.write( "

Algebra.Com's Answer #803067 by ikleyn(52790) $\"\"$ $\"About$

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document.write( "Use the identity\r\n" );
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document.write( "    P(E or F) = P(E) + P(F) - P(E and F).\r\n" );
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document.write( "Substitute the given values\r\n" );
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document.write( "    0.5 = 0.4 + P(F) - 0.1.\r\n" );
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document.write( "From the last equation get\r\n" );
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document.write( "    P(F) = 0.5 - 0.4 + 0.1 = 0.2.      ANSWER\r\n" );
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