document.write( "Question 1131025: Of the 157 students who took a mathematics exam, 87 correctly answered the first question, 86 correctly answered the second question, and 49 correctly answered both questions. How many students answered the second question correctly, but not the first? \n" ); document.write( "

Algebra.Com's Answer #747648 by ikleyn(52798) $\"\"$ $\"About$

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document.write( "They want you to take the subset of students who answered correctly the second question (86 students) and subtract \r\n" );
document.write( "from this subset the (other) subset of those who correctly answered both questions.\r\n" );
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document.write( "After getting this instruction from me, the solution is in one line:\r\n" );
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document.write( "    \"How many students answered the second question correctly, but not the first\" = 86 - 49 = 37.    ANSWER\r\n" );
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