document.write( "Question 762026: If P(E)=0.45, P(E or F)=0.50 and P(E and F)=0.20, find P(F) \n" ); document.write( "
Algebra.Com's Answer #463648 by jim_thompson5910(35256)\"\" \"About 
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P(E or F) = P(E) + P(F) - P(E and F)\r
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\n" ); document.write( "\n" ); document.write( "0.50 = 0.45 + P(F) - 0.20\r
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\n" ); document.write( "\n" ); document.write( "0.50 = 0.25 + P(F)\r
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\n" ); document.write( "\n" ); document.write( "0.50 - 0.25 = P(F)\r
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\n" ); document.write( "\n" ); document.write( "0.25 = P(F)\r
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\n" ); document.write( "\n" ); document.write( "P(F) = 0.25\r
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