document.write( "Question 744599: P(A)=0.40; P(B) = 0.25; the probability of both events occurring is 0.15. What is the probability of either event occurring?\r \n" );
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document.write( "A. 0.15 \n" );
document.write( "B. 0.50 \n" );
document.write( "C. 0.65 \n" );
document.write( "D. 0.80\r \n" );
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document.write( "Thank you for any help you can give. \n" );
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