In PowerBall under the 5/50 + 1/20 · since Jun 2018 rules — 870 draws, 1 from 1–20.
43times drawn · chance expected 44 −0.08σ
4draws waiting · a wait this long: 86% for any number
19.5average wait between appearances · chance says 20.0
78longest completed wait · 56% chance of one at least that long
7 is drawn as often as chance explains
Drawn 43 times in 870 draws against 43.5 expected, −0.08σ. Each draw is independent: after 4 draws away it is exactly as likely tonight as a number drawn yesterday.
7
Number 7, draw by draw
Drawn 43 times in 870 draws · average wait 19.5 draws · longest completed wait 78 · waiting 4 draws now
a completed wait — darker is longer the wait still running — a lower bound, not a finished gap
Where it lands in a sorted draw
Sort a draw and 7 has a favourite seat — chance gives a small number the low positions more often. That is the shape of sorting, not of the machine.
Never drawn alongside 19 of the other 19 numbers; chance expects about 19 such strangers by now. Every pair →
How many people play it
Under the crowd model, 7 is picked about 1.54× as often as an indifferent choice — 1st most popular of 20. That changes nothing about whether it comes up, and everything about how many ways a jackpot on it would be shared.
Nothing here predicts the next draw. A number’s history is a record of a fair machine’s past, and the machine keeps none of it: 7 is drawn with probability 1/20 tonight whatever it did last week.