PowerBi Table & Measure Issue

// T is your table and stores all fields.
// No other tables in the model are
// present. If this is not the case,
// you'll have to adjust the code.

[Name Has All Selected Subjects] =
// Returns 1 if the currently visible name
// does have all the subjects selected,
// and 0 if not.
var __oneNameIsVisible = HASONEFILTER( T[Name] )
var __result =
    if( __oneNameIsVisible,
        var __allSelectedSubjects =
            CALCULATETABLE(
                VALUES( T[Subject] ),
                ALLSELECTED( T )
            )
        var __subjectCount =
            COUNTROWS( __allSelectedSubjects )
        var __nameHasAllSelectedSubjects =
            // When we remove the current
            // filter on Subject and apply
            // __allSelectedSubjects,
            // we should get the same number
            // of subjects as __subjectCount.
            CALCULATE(
                1 * (__subjectCount
                    = DISTINCTCOUNT( T[Subject] )
                ),
                __allSelectedSubjects
            )
        return
            __nameHasAllSelectedSubjects
    )
return
    __result