user: Question: What was the lowest rank by average of a couple who had an average of 23 and a total of 115?
Columns: ['Rank by average', 'Place', 'Couple', 'Total', 'Number of dances', 'Average']
Types: ['real', 'real', 'text', 'real', 'real', 'real']
Sample row: [1.0, 1.0, 'Drew & Cheryl', 305.0, 11.0, 27.7]
SQL:

assistant: SELECT MIN("Rank by average") FROM "Table" WHERE "Average" = 23.0 AND "Total" = 115.0;