document.write( "Question 327982: In a certain school there are twice as many girls as boys.50% of the boys and 20% of the girls do not have lunch in school. What percent of the school enrollment does have lunch in school?\r
\n" ); document.write( "\n" ); document.write( "A 30% B 40% C 50% D 60% E 70% \r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #234878 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
let boys be x
\n" ); document.write( "girls = 2x
\n" ); document.write( "..
\n" ); document.write( "50% of boys have lunch
\n" ); document.write( "80% of girls have lunch0.\r
\n" ); document.write( "\n" ); document.write( "0.5x+0.8*2x have lunch.
\n" ); document.write( "0.5x+1.6x have lunch
\n" ); document.write( "2.1x have lunch
\n" ); document.write( "..
\n" ); document.write( "2.1x/3x*100 is the percentage that have lunch.\r
\n" ); document.write( "\n" ); document.write( "0.7*100=70%
\n" ); document.write( "
\n" );