If people self select what basis they're considered by, of course most will choose above average. Almost everyone has at least some area they're good at.
If you gave a specific subject (eg. languages, sciences, or maths) then you might get a better balance. But people tend to do what they're good at, and that means they'd consider themself above average in general.
@ the specific questions... 3 million, and 70%. But I wouldn't consider the theoretical maximum amount of money to be applicable - that's like saying that the average person can carry about $1,000,000 in 20 dollar bills (due to weight/size limitations), so what's the average pocket money? There are other concerns than the max possible score. Money can easily be traded for things of value, grades can't. Would you trade 2% for a hotdog?
If you gave a specific subject (eg. languages, sciences, or maths) then you might get a better balance. But people tend to do what they're good at, and that means they'd consider themself above average in general.
@ the specific questions... 3 million, and 70%. But I wouldn't consider the theoretical maximum amount of money to be applicable - that's like saying that the average person can carry about $1,000,000 in 20 dollar bills (due to weight/size limitations), so what's the average pocket money? There are other concerns than the max possible score. Money can easily be traded for things of value, grades can't. Would you trade 2% for a hotdog?