Question

answer 6 abc please please

Answer 1

let the no. of students who wear glasses be 2x
then total no of students=5x
so, Students who don't wear glasses =5x-2x =>3x
(a)
required ratio=2x/3x =>2/3

(b)it is given that students who don't wear glasses=15
so, 3/5=15/total students
total students=15×5/3 =>25 students

(c)no of stidents who wear glasses earlier=25-15 =>10
but, ATQ no. of students who wear glasses =10+5 => 15
so, New ratio=15/25 =>3/5