In a school
of the students are boys. If there are 240 girls, find the number of boys in the school.
Fraction of boys = 
Fraction of girls =1- 
=
Number of girls= 240
Number of girls = Total students × 
⇒ 240 = Total students × 
⇒ Total students = 240 ÷ 
Total students =640
Number of boys = Total students - Number of girls
=640 – 240 = 400
Number of boys= 400
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