CREATE TABLE table_7271 ("Year" FLOAT, "Pass Rate" TEXT, "% 'A' Aggregates" TEXT, "% 'B' Aggregates" TEXT, "% 'A' or 'B' Aggregates" TEXT, "Average A's per learner" FLOAT)

How many Years have a % 'B' Aggregates of 28%, and an Average A's per learner smaller than 3.2800000000000002?
SELECT COUNT("Year") FROM table_7271 WHERE "% 'B' Aggregates" = '28%' AND "Average A's per learner" < '3.2800000000000002'
SELECT COUNT("Year") FROM "table_7271" WHERE "% 'B' Aggregates" = '28%' AND "Average A's per learner" < '3.2800000000000002'