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At a school the ratio of the number of boys to number of girls is 9 :11.   There are 96 more girls than boys.  Work out the total number of students at the school.

( 96 / 2 ) * (9 + 11) = 960      

At a school the ratio of the number of boys to number of girls is 9 :11 

There are 96 more girls than boys. 

Work out the total number of students at the school. 

                    B + 96 = G 

                    B : G = 9 : 11  

                        B              9  

                    ———   =   ——  

                    B + 96         11  

                    11B  =  9 (B + 96) 

                    11B  =  9B + 864  

                     2B  =  864  

                       B  =  432  

                       G  =  B + 96  

                       G  =  432 + 96  

                       G  =  528

                  Total Students  =  432 + 528  

                  Total Students  =  960

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2 out of (9+11)   or  2/20 x = 96

x = 960