SELECT AVG(crimean_war) FROM table_name_49 WHERE second_afghan_war = "1" AND school = "hamblin and porter's school, cork"
Berapa rata -rata perang Krimea dengan perang Afghanistan kedua dengan total 1, dan sekolah Hamblin dan Porter's School, Cork?
CREATE TABLE table_name_49 (crimean_war INTEGER, second_afghan_war VARCHAR, school VARCHAR)