Ek class me 60% boys hai : Aur 120 girls
.Total kitne students hai
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let total no of students be x
% of girls= (100%-60%)=40%
no. of girls = 120
40/100of x= 120
x=300
% of girls= (100%-60%)=40%
no. of girls = 120
40/100of x= 120
x=300
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