Help with probability calculation

[TeresaHere]

The task is:
Assume a labor market with 2 types of workers: A and B. The additional value v that the worker brings to the firm is uniformly distributed for: A in interval VA=[2,6] and B in interval VB=[4,6].
For each group A and B, calculate the probabilities that a randomly chosen worker adds a value that is greater or equal than 5.5

Thanks so much in advance!

 

[Deleted member 4993]

The task is:
Assume a labor market with 2 types of workers: A and B. The additional value v that the worker brings to the firm is uniformly distributed for: A in interval VA=[2,6] and B in interval VB=[4,6].
For each group A and B, calculate the probabilities that a randomly chosen worker adds a value that is greater or equal than 5.5

Thanks so much in advance!

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[TeresaHere]

I don't know even where to start. Can I use some kind of formula to solve this problem?
I know that the average is 4 but I don't know how I can get to the result of at least 5.5