Table Name - TEST_SOFT1
Column name- ITEM_CODE and GRADE
so in ITEM_CODE there is like 10000 itemcode and in GRADES table we gave grades(A B and C) to them(itemcode).
and the grades are A,B and C.
so now we already gave the grades to all item_code.so we can assume that total itemcode grades is A=7000, B= 3000 and C= 1000
and we need to find (A+B)/C in numbers means how many grades we have?