How many total itv viewers were there for the episode with official itv ratings of 10.24 million?
create table table_27319183_7 (total_itv_viewers__millions_ varchar, official_itv_rating__millions_ varchar, PRIMARY KEY (total_itv_viewers__millions_))
select total_itv_viewers__millions_ from table_27319183_7 where official_itv_rating__millions_ = "10.24"