Thu 26 Jan, 2006 05:48 pm
What are the odds of drawing the same seven cards from a 73 card deck of Tarot cards, twice?
I would assume that it was done with replacement because from what you described that is the only possibility. Then the odds would be (1/73)^6,
BTW a tarot deck has 78 cards a major arcana consisting of 21 trump cards and the fool, and the minor arcana copnsisting of four 14 card suits.
In this case the odds, with replacement, are (1/78)^6.
Are you asking what the probability is of:
- selecting a set of seven cards from a deck of 73
- replacing them (and shuffling the deck)
- selecting the same set of seven cards from the deck of 73?
The probability of that is:
1 / C(73,7)
where C(73,7) is 73! / (66! * 7!)
Didn't think of that markr
Still a tarot deck has 78 cards,
So it would be 1/C(78,7)=3.8E-10 instead of 1/C(72,7)=6.1E-10
My Culpa, kev.
Thanks guys, I'll take your word for it math isn't my strong point.
helloa ny1 on this post i can shat to