document.write( "Question 1007535: About 30% of the US population is under 20 years old. About 17% of the population is over 60. Which of the following is the probability that a person chosen at random is under 20 or over 60?\r
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document.write( "17%
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document.write( "53%
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document.write( "47%
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document.write( "30%\r
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document.write( "I think it's 47%. am i right? \n" );
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Algebra.Com's Answer #623556 by jim_thompson5910(35256) ![]() You can put this solution on YOUR website! A = person is under 20 \n" ); document.write( "B = person is over 60\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "P(A or B) = P(A) + P(B) ... works because A and B are mutually exclusive\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "P(A or B) = 0.30 + 0.17\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "P(A or B) = 0.47 = 47%\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "you are correct. Nice work \n" ); document.write( " |