document.write( "Question 1201531: Bad gums may mean a bad mood. Researchers discovered that 85% of people who \n" );
document.write( "have suffered a bad mood had periodontal disease, an inflammation of the gums. Only 29% \n" );
document.write( "of healthy people have this disease. Suppose that in a certain community bad moods are \n" );
document.write( "quite rare, occurring with only 10% probability. If someone has periodontal disease, what \n" );
document.write( "is the probability that he or she will have a bad mood? \n" );
document.write( "
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