The average weight of all the students in a class is 40 kg . The average weight of boys is 47 kg and that of girls is 32 kg . If the number of girls in the class is 28,then what is the total number of students in the class?

A) 28                                    B) 32                                       C) 42                   D) 60

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dineshAptitude
The average weight of all the students in a class is 40 kg . The average weight of boys is 47 kg and that of girls is 32 kg . If the number of girls in the class is 28,then what is the total number of students in the...