Answer:
42 blue beads
Step-by-step explanation:
Solution:
Let's suppose the numbers as 13x, 7x and 4x respectively..
Where,
Orange = 13x
Blue = 7x
White = 4x
According to the question,
13x - 4x = 54
or, 9x = 54
or, x = 54/9
or, x= 6
Now,
Blue beads = 7x
= 7 × 6
= 42..