Question

Student =70% girls =504 Total boys =?​

Answer 1

% of boys + % of girls = 100

70 + % of girls = 100

% of girls = 30

and,

number of girls = % of girls/100 × total students

504= 30/100 × total students

⇒ total students =1680

∴ number of boys = (total students − no. of girls)

= (1680−540)

=1176

Answer 2

Step-by-step explanation:

let the number of boys be x

percentage of boys = 70%

percentage of girls = 30%

30% of x = 504

x = 504 × 100 / 30

x = 1680