Background

The South Korean lottery pays out millions of dollars to the winners. To date, there have been over 1000 draws (1 a week). The numbers are drawn by a vacuum sucking up plastic balls with the winning numbers written on them. Many South Korean citizens speculate that this system is rigged (or at least not 100% fair) because many numbers have been chosen unproportionally. Is it possible that choosing certain numbers will improve one's chances of winning?

Data

Additional Info

Per draw, 6 numbers are chosen + 1 bonus number
Of the 6 primary numbers, if at least 3 are correct the ticket is a winner.
The bonus number will add a bonus if 5 out of 6 primary numbers are correct.
The order of the numbers do not matter. They will always be from least->greatest.

The following needs to be taken into consideration to calculate if your model is making money:
-Each guess of lottery numbers costs about $1 (you can guess an unlimited amount of times)
-If 3 numbers match you win $5 (ie. if you guess 5 times and only one ticket wins, you get your money back)
-if 4 numbers match you win $100
-if 5 numbers match you win $1,000
-if 5 numbers and the bonus number match you win $10,000
-if all 6 numbers are correct you get the jackpot (usually at least $100,000-> $10M)

Source

https://m.dhlottery.co.kr/