Count rows for calculated measure

Question

Hi, I have a sample data table below along with the requirements: 

order No	Cust Name	Y/N?	Revenue class	Amount
111	ABC	Y	Apple	100
112	XYZ	N	Apple	22
113	ABC	N	Apple	300
114	XYZ	Y	Orange	66
115	DFG	N	Apple	667
116	DDF	Y	Orange	567
112	XYZ	N	Mango	345
111	ABC	Y	Mango	349

 

I have calculated a measure = calculate(DISTINCTCOUNT('Table'[order No]),FILTER(VALUES('Table'[Cust.Name]),CALCULATE(DISTINCTCOUNT('Table'[Y/N?])>1))) and I got the answer "4" orders.

Now: I would like to get count of orders by Rev.Class. In the given example: The answer should be Apple=2, Mango=2. My requirement here is to calculate the count of orders by Rev.class, which is equal to the calculated measure above.