document.write( "Question 395057: If P(A) = 0.80, P(B) = 0.70 AND P(A or B) = 0.90, then P(A and B) is what? \n" ); document.write( "

Algebra.Com's Answer #280484 by robertb(5830) $\"\"$ $\"About$

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P(A and B) = P(A) + P(B) - P(A or B) = 0.80 + 0.70 -0.90 =0.6 \n" ); document.write( "

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