Query Random Records With Sum creteria

Dear All ...
im new memmber in this great forum ..
i need help ...
i have Table like :
ID Subject Points
---- ------- --------
1 1 10
2 1 20
3 2 10
4 3 5
5 1 15
6 2 10
7 3 10
8 1 20

i need to select random records from table where Subject = 1 and Total Sum for selected records Points = 25

any one can help me ..
thanks

select top 25 * from tablename where subject=1 order by newid()

What about Sum of points ,, it should be 25 ??? :confused:

25 is the sum of records points ..