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Required PERCENTAGE of boys

= $(\frac{{\left[ {\left( {\frac{1}{3}} \right){\rm{\;}} \TIMES {\rm{\;}}\left( {\frac{3}{8}} \right){\rm{\;}} \times {\rm{\;}}\left( {\frac{5}{9}} \right){\rm{\;}} \times {\rm{\;}}1008} \right]}}{{\left[ {\left( {\frac{3}{8}} \right){\rm{\;}} \times {\rm{\;}}1008} \right]}} \times 100)$ 

⇒ 18.5


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