document.write( "Question 367064: If P(A or B) = 0.7, P(A) = 0.3 and P(B) = 0.8, determine
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Algebra.Com's Answer #261714 by Jk22(389) $\"\"$ $\"About$

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The relationship is :
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\n" ); document.write( "P(A or B) = P(A) + P(B) - P(A and B)
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\n" ); document.write( "here : .7 = .3 + .8 - P(A and B)
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\n" ); document.write( "=> P(A and B) = 1.1 - 0.7 = 0.4
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