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db.collection.aggregate([{"$group":{"_id":null,"promedio":{"$avg":"$SALARIO"},"datos":{"$push":{"_id":"$_id","cedula":"$CEDULA","nombre":"$NOMBRE","salario":"$SALARIO"}}}},{"$project":{"filtrados":{"$filter":{"input":"$datos","as":"elem","cond":{"$gte":["$$elem.salario","$promedio"]}}}}},{"$unwind":"$filtrados"},{"$replaceRoot":{"newRoot":"$filtrados"}}])