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Windfall lottery loophole
http://www.ped.jjvk.com/phpbb/viewtopic.php?f=3&t=1223
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發表人:  mimiba [ 2022-08-02, 19:03 ]
文章主題 :  Windfall lottery loophole

https://thecinemaholic.com/winfall-lott ... explained/

引言回覆:
Each ticket of Winfall cost $1 and a player could pick six numbers between 1 and 49 with one ticket. If the six numbers Michigan Lottery drew were the same six numbers a player picked, the individual would win a jackpot of at least $2 million or higher. If the player guessed five, four, three, or two of the six numbers, lesser prizes were awarded.

If nobody won the jackpot until the prize money reached $5 million, the money will roll down to the lesser prizes in the next draw, only if there wasn’t a jackpot winner in the same. The roll-down system of Winfall made the lesser and more attainable prizes more valuable than in a regular scenario. For example, a three-number combination was awarded $50 instead of $5 and a four-number combination was awarded $1,000 instead of $100. Then enter the game of probability. There was a 1-in-54 chance to pick a three-number combination and a 1-in-1,500 chance to pick a four-number combination.



1~49 選6個數字
6個數字全中 -> 中頭獎
中5個數次 -> 次獎

發表人:  mimiba [ 2022-08-02, 19:10 ]
文章主題 :  Re: Windfall lottery loophole

https://zhidao.baidu.com/question/50384 ... 20964.html
中奖概率怎么计算?

https://www.naer.edu.tw/upload/1/16/doc ... %94%9F.pdf
排列組合

https://zh.wikipedia.org/zh-tw/%E7%BB%8 ... 0%E5%AD%A6
組合數學

發表人:  mimiba [ 2022-08-02, 19:45 ]
文章主題 :  Re: Windfall lottery loophole

範例:
https://www.taiwanlottery.com.tw/superl ... /index.asp
引言回覆:
威力彩是一種樂透型遊戲,其選號分為兩區,您必須從第1個選號區中的01~38 的號碼中任選6個號碼,並從第2個選號區中的01~08的號碼中任選1個號碼進行投注,這六個+一個號碼即為您的投注號碼。開獎時,開獎單位將從第1區01~38的號碼中隨機開出六個號碼,再從第2區01~08的號碼中隨機開出一個號碼,這一組六個+一個號碼,就是該期威力彩的中獎號碼,也稱為「獎號」。您第1區的選號中,如果對中當期第1區開出之任一個獎號,而第2區亦對中當期第2區開出之獎號,即為中獎(普獎),並可依規定兌領獎金。


引言回覆:
頭獎中獎率約1/2,209萬,總中獎率約1/9


======================
頭獎機率
=COMBIN(38,6)*COMBIN(8,1)
=COMBIN(38,6)*8
=22085448 分之一
======================

總中獎率
= 1 / (COMBIN(38,6)*8)[頭獎] + 1/(COMBIN(38,6))[貳獎] + ......

https://www.319papago.idv.tw/lottery/lottery-power.html
總中獎率 計算方式

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