Question: If the RR Rate is less than 0.75 with a result of RR:08,09, what is the average appeared?
SQL: SELECT AVG("Appeared") FROM "2-1356185-6" WHERE "RR W Rate" < 0.75 AND "Result" = 'RR:08,09';

Question: What's the total appeared that has an RR Rate less than 0.17?
SQL: SELECT SUM("Appeared") FROM "2-1356185-6" WHERE "RR W Rate" < 0.17;

Question: For Angelique Kerber who had an RR Rate of less than 0.33, what's the appeared?
SQL: SELECT SUM("Appeared") FROM "2-1356185-6" WHERE "RR W Rate" < 0.33 AND "Player" = 'Angelique Kerber';