How to get the average of min record by id

[vvvvvvvvvv]

How to calculate the average grade of student when records for STDT_ID 4 are duplicated in qliksense measure?

I know it can calculate by average the min record by ID. But don't know how to implement in QS measuer.

[rockabs]

Perhaps this

Avg({<[STDT ID]={"=Count([STDT ID])>1"}>} [STDT ID])

[vvvvvvvvvv]

I want to get the average grade??

[vvvvvvvvvv]

what if I also want the year equal to some specific year?

[Anil_Babu_Samineni]

Perhaps this

Avg({<[STDT ID]={"=Count([STDT ID])>1"}, Year={2019}>} Grade)

[vvvvvvvvvv]

It only work for there are multiple records with same id, cannot include the single record

[Anil_Babu_Samineni]

From Given Snapshot, What is the outcome you are looking?