document.write( "Question 162544: Most mathematics professors love to invest their hard-earned money. A recent survey of 150 math professors revealed that: \n" );
document.write( "111 invested in stocks; \n" );
document.write( "98 invested in bonds; \n" );
document.write( "100 invested in certificates of deposit; \n" );
document.write( "80 invested in stocks and bonds; \n" );
document.write( "83 invested in bonds and certificates of deposit; \n" );
document.write( "85 invested in stocks and certificates of deposit; \n" );
document.write( "9 did not invest in any of the three. \n" );
document.write( "How many mathematics professors invested in stocks and bonds and certificates of deposit? \n" );
document.write( "
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