buzzpaff
buzzpaff
Joined: Mar 8, 2011
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July 10th, 2012 at 8:37:46 AM permalink
My daughter is taking a college course in statistics. The problem is if you take a random deck of cards, draw 10 cards randomly, do it
40 times, how many times will you get a 5 card flush. She did it at random.org and got a flush 9 times. Called to ask me if that was the right answer. Told her I would call her back after I calculated it.


HELP< PLEASE >>>>>>>>>>
buzzpaff
buzzpaff
Joined: Mar 8, 2011
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July 10th, 2012 at 8:42:44 AM permalink
Just looked and none of the math whiz's are on-line. Talk about bad luck.
DJTeddyBear
DJTeddyBear
Joined: Nov 2, 2009
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July 10th, 2012 at 9:57:55 AM permalink
This is way over my head, but I'll ask a question that the math wizzes might either assume or overlook.

Are you looking for EXACTLY five cards of the same suit, or AT LEAST five of the same suit?
Superstitions are silly, childish, irrational rituals, born out of fear of the unknown. But how much does it cost to knock on wood? 😁 Note that the same could be said for Religion. I.E. Religion is nothing more than organized superstition. 🤗
buzzpaff
buzzpaff
Joined: Mar 8, 2011
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July 10th, 2012 at 10:03:23 AM permalink
MaryJo says 5 or more. Shows how good I am at math. I didn't even get the question right !
dwheatley
dwheatley
Joined: Nov 16, 2009
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July 10th, 2012 at 10:04:08 AM permalink
The probability of getting a 5-card flush (or more) in 10 cards is about 0.22663 (this includes straight flushes). After 40 trials, the expected number is 9.0652
Wisdom is the quality that keeps you out of situations where you would otherwise need it
buzzpaff
buzzpaff
Joined: Mar 8, 2011
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July 10th, 2012 at 11:38:36 AM permalink
Thanks a lot. She tried it once at Random.org and got a flush 9 times. THANKS AGAIN.

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