document.write( "Question 1131325: please help me with this problem using the data below:
\n" ); document.write( "P(A ∪ B) = .9, P(B) = .7, P(A ∩ B) = .3.
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Algebra.Com's Answer #747960 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "P(A U B) = P(A) + P(B) - P(A n B)\r\n" );
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document.write( "Substitute the given data\r\n" );
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document.write( "0.9 = P(A) + 0.7 - 0.3.\r\n" );
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document.write( "From here, find P(A).\r\n" );
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document.write( "ANSWER.  P(A) = 0.5.\r\n" );
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