document.write( "Question 1145218: P(A) = 0.50, P(B) = 0.30, and P(A and B) = 0.15. What is P(A or B)? \n" ); document.write( "

Algebra.Com's Answer #766421 by ikleyn(52810) $\"\"$ $\"About$

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document.write( "    P(A or B) = P(A) + P(B) - P(A and B)\r\n" );
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document.write( "This universal formula of Probability theory is valid ALWAYS, for any events A and B.\r\n" );
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document.write( "Substitute the given data and calculate.\r\n" );
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document.write( "    P(A or B) = 0.50 + 0.30 - 0.15 = 0.65.    ANSWER\r\n" );
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