“How was your exam?” “A couple of questions were tricky, but on the ______ it

"How was your exam?" "A couple of questions were tricky, but on the whole it was pretty easy."
Dịch: “Cậu thi thế nào?” “Có một số câu hỏi khó, nhưng nhìn chung thì khá là dễ”
on the whole: nhìn chung