I am not sure on how to do this however here is a link with information thst will be able to help you around this subject.i hope this helps
https://www.bbc.com/bitesize/guides/z8k887h/revision/1
Answer: 15/5=3 3-1= 2
The answer would be 2. :P
Step-by-step explanation:

The probability of getting a red cube is 3:5 the probability of getting a blue cube is 2:5
Answer:
What is it??
Step-by-step explanation:
wat's the question??