Answer:

Step-by-step explanation:
Given




Required
Determine the probability of getting a red chair, next.
First, we nee the total number of chairs


Probability of getting red is then calculated as thus;



2x+1=3(x+1)-x-2
2x+1=3x+3-x-2
2x+1=2x+1
2x=2x
x=x
infinite answers
12x12.5=150
Steps:
1. convert 12.5 into a fraction: 25/2
2. also convert 12 into a fraction: 12/1
3. multiply 25/2x12/1=150.
Hope I helped! :D