Given: Ratio of boys and girls = 8 : 11 Total number of students = 399 Calculation: Let the number of boys and girls be 8x and 11x respectively Total number of students =(8x+11x) ⇒ 19x Now, according to question 19x=399< br> ⇒8x=(399/19x)×8x ⇒168 ∴ The number of boys are 168