document.write( "Question 937082: A class has 30 pupils. 21 are right handed. There are 16 girls in the class. Not all girls are right handed. What is the smallest number of girls who are right handed. \n" ); document.write( "

Algebra.Com's Answer #570528 by TimothyLamb(4379) $\"\"$ $\"About$

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x = number of girls
\n" ); document.write( "y = number of boys
\n" ); document.write( "---
\n" ); document.write( "x + y = 30
\n" ); document.write( "x = 16
\n" ); document.write( "y = 30 - x
\n" ); document.write( "y = 30 - 16
\n" ); document.write( "y = 14
\n" ); document.write( "---
\n" ); document.write( "assuming that all boys are right handed ...
\n" ); document.write( "the smallest number of right handed girls is:
\n" ); document.write( "21 - 14 = 7
\n" ); document.write( "---
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