DAX function to apply OR condition on multiple columns based on Slicers

Need a all() to remove the current filter context

SelectedEmployees =

CALCULATE(

    COUNTROWS(tblData),

    FILTER(

       All( 'tblData' ),

        (tblData[Location] in VALUES(tbLocations[Locations]) ||

        tblData[Gender] in VALUES(tblGender[Gender]) ||

        tblData[Age] in VALUES(tblAge[AgeGroups])) 

    )

)

Make sure these 3 tables tbLocations, tblGender, tblAge DON'T filter each other. If so, the measure is fairly simple,

SelectedEmployees = 
CALCULATE(
    COUNTROWS(tblData),
        ALL('tbLocations'),ALL(tblGender), ALL(tblAge),
        OR(OR(tblData[Location] in VALUES(tbLocations[Locations]),
                tblData[Gender] in VALUES(tblGender[Gender])), 
            tblData[Age] in VALUES(tblAge[AgeGroups]))   
)