Oz Lotto: Main Numbers Versus Supplementary Balls
The reviewed base game selects seven numbers from 47. The operator draws seven winning numbers and three supplementary numbers. Players do not select a second three-number supplementary pool.
- Review jurisdiction
- Australia; operator source reviewed for Western Australia
- Base number format
- 7 from 47. No separately selected bonus pool.
- Official jackpot odds
- 1 in 62,891,499
- Draw days
- Tuesday
- Base price
- Not available — not verified
- Price scope
- Not verified
- Last reviewed
How the jackpot odds are calculated
C(47,7) = 62,891,499. With uniform unordered selections and independent separate pools where applicable, one exact ticket has probability 1/62,891,499. The exact BigInt count matches the reviewed official jackpot denominator.
Static result: 1 in 62,891,499; official match.
Do supplementary balls multiply jackpot outcomes?
No. The jackpot match is the seven winning numbers, so the denominator is C(47,7)=62,891,499. A multiplication by a supplementary-ball count would model a different ticket. Supplementary numbers matter for some lower prize divisions, whose probabilities require their own model.
The old LottoFlick jackpot denominator was 45,379,620, which did not match its seven-from-47 configuration. The independent count and operator table agree on 62,891,499. The draw-only supplementary count was also corrected from two to three. Those corrections are recorded in the verification report.
The Western Australian operator source supports Tuesday drawings. A current base price was not verified, so the Explorer shows that gap rather than reusing a price from another jurisdiction.
What understanding the odds can and cannot do
For t distinct tickets in the same uniform base draw with N equally likely outcomes, jackpot coverage is t/N when 0 ≤ t ≤ N. Buying duplicate selections does not add new outcomes. Across independent draws, if each ticket event has fixed probability p, the chance of at least one success in t draws is 1−(1−p)^t. This explains probability; it does not recommend more spending.
Balanced selections, birthdays and past draw frequencies do not improve the jackpot chance of a particular valid ticket. LottoFlick does not predict winning numbers. Use the combination calculator to explore models and the Explorer to compare field scopes.
Official evidence and limits
- OZ Lotto game information — Lotterywest; verified fields: name, country, jurisdiction, mainPick, mainPool, drawOnlyBonus, drawSchedule, jackpotOdds, overallOdds; reviewed 2026-10-04.
Verified status applies to the stated base format and sourced fields. Claim deadlines, taxes, additional products and live jackpot amounts are not verified here. Check the responsible operator before purchasing or claiming a ticket.