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) ![]() You can put this solution on YOUR website! 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? \n" ); document.write( "--- \n" ); document.write( "P(a and b) = P(a) + P(b) - P(a or b) \n" ); document.write( "--- \n" ); document.write( "P(hist and psyc) = 0.3 + 0.4- 0.6 = 0.1 \n" ); document.write( "====================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |