document.write( "Question 465190: Joe feels the probability of getting an A in history is .3, the probability of getting a A in physcology is 0.4, and the probability of getting an A in history or Physcology is 0.6 . What is the probability of getting an A IN BOTH SUBJECTS? \n" ); document.write( "
Algebra.Com's Answer #318755 by stanbon(75887)\"\" \"About 
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Joe feels the probability of getting an A in history is .3,
\n" ); document.write( "the probability of getting an A in psychology is 0.4,
\n" ); document.write( "and the probability of getting an A in history or Psychology is 0.6 .
\n" ); document.write( " What is the probability of getting an A IN BOTH SUBJECTS?
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\n" ); document.write( "P(a and b) = P(a) + P(b) - P(a or b)
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\n" ); document.write( "P(hist and psyc) = 0.3 + 0.4- 0.6 = 0.1
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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