Datagrid group header

Question

Hello All,

 I have a observable collection of students and I have created a collectionviewsource out of that in my viewmodel to group that based on the groupname.

 

GroupView = CollectionViewSource.GetDefaultView(Students);

GroupView.GroupDescriptions.Add(new PropertyGroupDescription("GroupName"));

 

Using  DataGrid.GroupStyle, how to give information like  physics(2/7 ).Here 7 students are there in physics group and out of that 2 student's mark has given.

Is this possible via XAML of from the viewmodel behind.

 

Please help me to figure it out. Thanks in advance .