document.write( "Question 1083759: there are 50 students in a class,2/5 of them are boys & 25% of the boys are black.If there are 15 black students in the class ,then how many girls are in white? \n" ); document.write( "
Algebra.Com's Answer #697941 by ankor@dixie-net.com(22740)\"\" \"About 
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there are 50 students in a class, 2/5 of them are boys
\n" ); document.write( "\"2%2F5\" * 50 = 20 boys
\n" ); document.write( ":
\n" ); document.write( " & 25% of the boys are black.
\n" ); document.write( ".25 * 20 = 5 boys are black
\n" ); document.write( ":
\n" ); document.write( "If there are 15 black students in the class,
\n" ); document.write( "50 - 15 = 35 white students
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\n" ); document.write( " then how many girls are in white?
\n" ); document.write( "Find the number of white boys
\n" ); document.write( "20 - 5 = 15 white boys
\n" ); document.write( "then
\n" ); document.write( "35 - 15 = 20 girls are white
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