document.write( "Question 363839: In a certain senior class, 72 percent of the male students and 80 percent of the female students have applied to college. What fraction of the students in the senior class are male?\r
\n" ); document.write( "\n" ); document.write( "(a) There are 840 students in the senior class
\n" ); document.write( "(b) 75 percent of the students in the senior class have applied to college
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #259473 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!


\n" );
document.write( "Hi, 
\n" );
document.write( "There are 840 students in the senior class
\n" );
document.write( "75 percent of the students in the senior class have applied to college\r
\n" );
document.write( "\n" );
document.write( "Let x represent the number of females.  then (840 -x ) represents the number of males.
\n" );
document.write( "question states
\n" );
document.write( ".72(840-x) + .80x = .75*840
\n" );
document.write( "solving for x
\n" );
document.write( ".08x = .03*840
\n" );
document.write( "x = 315 of the senior class are females
\n" );
document.write( "840-315 = 525 are males\r
\n" );
document.write( "\n" );
document.write( "checking our answer
\n" );
document.write( ".72*525 + .80*315 = 378 + 252  = .75*840 = 630 \n" );
document.write( "

\n" );