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The mkiv Supra Owners Club

Maths - odds - bingo


tbourner

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We know the equation for Lotto is a Combination of 49(n) and 6(k):

image

giving around 14M to 1.

 

So I'm looking at Bingo now, specifically 90 ball bingo, and they have jackpots if you get a full house within a certain number of drawn balls. So I want to know the working for the odds of that happening. The equation isn't as simple as the one above.

 

We have 90 numbers, we select 15 from 90, they draw one at a time randomly from the 90. What are the odds of having your 15 drawn within the first 40 draws (for example)?

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