A class has 50 students with average weight of 45 kgs.Out of these 30 girls with average weight of 42.5 kgs.Find the average weight of boys
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total no. of student is 50
girls = 30
boys = ?
the average weight of girls is 42.5 kg
average weight of boys is ?
subtract total girls from total no. of student
50-30=20
total boys is 20
subtract the average weight of girls from total average weight of student
45-42.5=2.5
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