Lotteries, scratchcards and bingo
What is the best way to calculate the probability of bingo on a specific ball?
Direct answer
Model card layout, ball draws and the exact required pattern; there is no universal probability independent of game format.
How to use this answer
The principle is supported by the referenced rules, but a different operator or market can apply a different settlement condition. Treat the named provider as a specific example, not as a universal betting rule.
Use the published game matrix and prize rules for the exact lottery or scratchcard. Identical tickets, rollover jackpots and claimed win patterns should be assessed using probabilities rather than intuition.
Reference: lotterywest.wa.gov.au · published rules or source ↗