In a mixed school of x students, there are y boys. What fraction of the students are girls ?
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Number of boys = y
Total number of of students = x
Number of girls = x-y
Fraction of girls = Total number of girls/Total number of students
Fraction of girls = (x-y)/x = 1-y/x
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Number of boys = y
Total number of of students = x
Number of girls = x-y
Fraction of girls = Total number of girls/Total number of students
Fraction of girls = (x-y)/x = 1-y/x
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