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question about KENO

Discussion in 'Online Casinos' started by orion, Apr 2, 2014.

    Apr 2, 2014
  1. orion

    orion Experienced Member PABnonaccred

    Occupation:
    wine. We make it.
    Location:
    deep south of Eu
    Ok, I can admit it: I am a true disaster with maths. :(

    I hope somebody here can be so kind helping me. Maybe it's a easy calculation, but I am not able to do it.

    I was playing a combination of 6 numbers (let's say 1,2,3,4,5 and 6) and I did 115 spins in a row.
    During these 115 spins ONE of the 6 numbers (let's say number 6) has NEVER been hit, not even once.

    How many probabilities of such an event ?

    (standard keno 80 numbers, of which 20 drawn per spin).
     
  2. Apr 2, 2014
  3. K2C

    K2C Experienced Member webmeister

    Occupation:
    Data analyst
    Location:
    USA
    P(A specific number not drawn in a single round) = 60/80 = 3/4 = 0.75
    P(A specific number not drawn in 115 rounds) = 0.75^115 = 4.3 E-15 - that's small
    P(ONE of the 6 numbers not drawn in 115 rounds) ~ 6* 4.3 E-15 = 2.6 E-14 that's still small.

    You have logs? Screenshots?
     
    1 person likes this.
  4. Apr 2, 2014
  5. orion

    orion Experienced Member PABnonaccred

    Occupation:
    wine. We make it.
    Location:
    deep south of Eu
    Thank You K2C !!!

    yes I have got something recorded but so far I am keeping it for myself, since first I would like to understand if such a situation can still be considered as "bad luck".

    Because this is what the casino told me (by written btw).
     
  6. Apr 2, 2014
  7. K2C

    K2C Experienced Member webmeister

    Occupation:
    Data analyst
    Location:
    USA
    No that's not bad luck. That's either you having missed something or the game being rigged/broken. And based on my experience I would bet on the former (no offense).

    That does not add to your story at all. Every casino's CS gets dozens of whining emails about loosing streaks of sorts and they just respond to those from the script without bothering to read into details.
     
    1 person likes this.
  8. Apr 2, 2014
  9. spintee

    spintee Meister Member webby mm2

    Occupation:
    gambler :)
    Location:
    Northants
    That is terrible odds, Thats not being unlucky,
    Only other day I signed up to a mobile phone casino, Got free 5£ played (21s) at 50p ago I played elven hands as won once, The dealer got 4x 21 ace and picture & another 3, 21s with xtra card, and won all the rest of games, Now if that's not fixed I do not no what is
     

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