Coverage calculation

This is something similar to what I've posted before:

[Client Coverage] =
var TotalClientCount =
	CALCULATE(
		DISTINCTCOUNT( T[Client] ),
		// Using allselected here means
		// that the results will be relative
		// to the currently visible/selected
		// set of clients. If you want to
		// get the ratios in absulute terms,
		// change this to ALL( T ).
		ALLSELECTED( T )
	)
var Result =
	AVERAGEX(
		DISTINCT( T[Product] ),
		CALCULATE( DISTINCTCOUNT( T[Client] ) )
			/ TotalClientCount
	)
return
	Result

By the way, this solution comes with a huuuuuge warning: You should never use single-table models in production. If you want to know one of the many reasons why not, please check this out: https://community.powerbi.com/t5/DAX-Commands-and-Tips/Why-one-table-models-will-produce-WRONG-NUMBERS/td-p/1904161