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Records: 4  Duplicates: 0  Warnings: 0
Records: 16  Duplicates: 0  Warnings: 0
question sum(ai.value * a.weight) / sum(a.weight) avg(ai.value)
a 3.6363636363636367 3.5000
b 2.8484848484848486 3.0000
c 2.666666666666667 2.5000
d 2.8181818181818183 3.0000