Calculate filter

Hello guys, 

I have some issues with a meassure, im trying to get the Average score of a customer survey, there are 5 questions, but the most important one are only three. How could I calculate the average without taking into consideration the other 2 questions? I dont want to remove them from the model because at some point we would like to know the average score of each one. 

Here is how the data is modeled. What I need is the average of question 2, 3 and 4. 

Is this the right way to do it?

CSAT Score Agents = CALCULATE(
                        AVERAGE(Surveys_Details[Score]), 
                            FILTER(
                                Surveys_Details, 
                                    Surveys_Details[Survey Question] in {"Pregunta2", "Pregunta3", "Pregunta4"})
)

Thanks