Answer :
The number of red tiles in the box given the chance ratio of red to blue tiles is 18
Ratio
- Number of red tiles = x
- Number of blue tiles = 12 + x
- Total tiles = x + 12 + x
= 12 + 2x
- Ratio of red = 3
- Ratio of blue = 5
- Total ratio = 3 + 5 = 8
Number of red tiles = 3 / 8 × 12+2x
x = 3(12 + 2x) / 8
x = (36 + 6x) / 8
8x = 36 + 6x
8x - 6x = 36
2x = 36
x = 36/2
x = 18 tiles
Learn more about ratio:
https://brainly.com/question/2328454
#SPJ1