CREATE TABLE table_16048129_5 (number_of_families INT, average_family_size VARCHAR)

What is the most number of families in regions where average family size is 2.7?
SELECT MAX(number_of_families) FROM table_16048129_5 WHERE average_family_size = "2.7"
SELECT MAX("number_of_families") FROM "table_16048129_5" WHERE "2.7" = "average_family_size"