Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What was the lowest rank by average of a couple who had an average of 23 and a total of 115?

### Inputs:
table_name: table, columns: ['Rank by average', 'Place', 'Couple', 'Total', 'Number of dances', 'Average']

### Response:
SELECT MIN Rank by average FROM table WHERE Average = 23 AND Total = 115