A bag contains 2 pink, 3 red and 5 blue balls. Find the ratio of pink balls to the total number of balls.
1:5
Given that the bag contains 2 pink, 3 red and 5 blue balls.
So total number of balls = 2+3+5 = 10
∴ Ratio of pink balls to the total number of balls = 2:10 = 210=15=1:5