How many meals does an average person eat in their lifetime?

Well,the healthy way to eat is only have three meals a day.

But i guess little bits in between like fruits wouldn't hurt! :]

Several factors contribute to what an average person can eat in a day, as in age, sex, body mass and activity levels. The best way to find out how much you should be eating in terms of calories is to use an online BMR calculator. I would advise you use a version where activity is also included to give a more accurate result.