MDX query help

 Hi All,

I am having issues in writing an MDX query for the below scenario.As I am new to MDX it is getting diffcult to work on the below scenario.

I have some measures created as

Attainment = Num/DEN  (%)

Number of Student = Count of student.

A Teacher would have some student under him.

So for e.g. I would have teacher X having '11' students under him.

I wonder how to write an MDX query that could bucket the number of students based on Attainment

so for instance, I could see the

Teacher (X)

        3 with Attainment of 100%,

        5 with Attainment between 95-99,

        2 with Attainment between 90-94,

        and 1 with Attainement < 90

Thanks

madhur_ms