document.write( "Question 952135: The probability of passing the math class of Professor Jones is 62%, the probability of passing Professor Smith's physics class is 34%, and the probability of passing both is 30%. What is the probability of passing one or the other? \n" ); document.write( "
Algebra.Com's Answer #581484 by Theo(13342)\"\" \"About 
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p(a or b) is equal to p(a) + p(b) - p(ab)
\n" ); document.write( "a represents the event of passing jones.
\n" ); document.write( "b represents the event of passing smith.
\n" ); document.write( "ab represents the event of passing both smith and jones.
\n" ); document.write( "p(a or b) = p(a) + p(b) - p(ab) = .62 + .34 - .30 = .66
\n" ); document.write( "probability of passing smith or jones is 66%.
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