What is the ratio of male and female among the age of teenager when the education is above 10?
ratio = DIVIDE(COUNT(SEX = 'Male' where age BETWEEN 13 AND 19 and EDUCATIONNUM > 10),COUNT(SEX = 'Female' where age BETWEEN 13 AND 19 and EDUCATIONNUM > 10));
SELECT CAST(SUM(CASE WHEN SEX = 'Male' THEN 1 ELSE 0 END) AS REAL) / SUM(CASE WHEN SEX = 'Female' THEN 1 ELSE 0 END) FROM Customers WHERE age BETWEEN 13 AND 19 AND EDUCATIONNUM > 10