Among the male customer in their twenties, how many are from places where the average income is more than 3000?
male customer in their twenties refer to SEX = 'Male' where age BETWEEN 20 AND 29; average income is more than 3000 refers to INCOME_K > 3000;
SELECT COUNT(T2.GEOID) FROM Customers AS T1 INNER JOIN Demog AS T2 ON T1.GEOID = T2.GEOID WHERE T1.SEX = 'Male' AND T2.INCOME_K > 3000 AND T1.age >= 20 AND T1.age <= 29