I took this in high school and was an INFP.
Took it just now, many years later, and got this.
Introverted (I) 71.43% Extroverted (E) 28.57%
Intuitive (N) 60.98% Sensing (S) 39.02%
Thinking (T) 51.61% Feeling (F) 48.39%
Perceiving (P) 62.86% Judging (J) 37.14%
Your type is: INTP
INTP - "Architect". Greatest precision in thought and language. Can readily discern contradictions and inconsistencies. The world exists primarily to be understood. 3.3% of total population.
so assuming equal distribution of each personality type, we have 1 / 4^2 probability of being in any one of them? which is 6.25%?
edit: found this statistical distribution table