1.

(A) 324(C) 600(B) 256(D)216

Answer»

% of boys = 60%% of girls= 100%-60%=40%

no of girls = 216

let the total no of students be x

so 40% of x = 21640/100*x = 216x = 216*100/40x = 540total no of students = 540no of boys = 540 - 216= 324



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