What does body type average mean?
Dose it mean your scrawny but you have fat on you?
Average, when used in reference to body type, means you are in the weight range that a person your age, and perhaps height, is expected to be. You aren't plump and you aren't skinny; you're average.
it's the average weight you should be for you height and age
I think it means you're at a healthy weight for your body meaning not too skinny and not too fat. Just normal :)