CREATE TABLE table_142950_1 (total_number_of_students VARCHAR, vice_chancellor VARCHAR)

How many members have professor edward acton as vice-chancellor?
SELECT COUNT(total_number_of_students) FROM table_142950_1 WHERE vice_chancellor = "Professor Edward Acton"
SELECT COUNT("total_number_of_students") FROM "table_142950_1" WHERE "Professor Edward Acton" = "vice_chancellor"