What is the total points of teams using a ligier js11/15 chassis?
CREATE TABLE table_name_18 (points VARCHAR, chassis VARCHAR)
SELECT COUNT(points) FROM table_name_18 WHERE chassis = "ligier js11/15"
### Context: CREATE TABLE table_name_18 (points VARCHAR, chassis VARCHAR) ### Question: What is the total points of teams using a ligier js11/15 chassis? ### Answer: SELECT COUNT(points) FROM table_name_18 WHERE chassis = "ligier js11/15"