Answer
The fraction of blue beads is 1 - 2/3 - 1/4 = 1/12
If the total number of beads is t then
red - blue = 42
2t/3 - t/12 = 42
therefore
7t/12 = 42
t = 12x42/7 = 72
Answer:
3/1/5
3×5/1
15/1
15 you don't need diagram
