Question 755632: I have a question which relates to odds. I went to Alton Towers the other day and when you buy a meal in the restaurant you are asked to pick a number between 1 and 90. You then hit a random number generating machine. If you get the number correct then you win your meal.
A friend of mine said that if 90 people go through there is a 1 in 90 chance of someone winning. I was skeptical, surely its a 1 in 90 chance if they all picked the same number. But if each person chooses randomly then the chances of 1 of the 90 people winning is less.
So to simplify-
90 people go through the checkout, each choose a random number between 1 and 90, a machine generates a random number between 1 and 90, what are the odds of someone guessing the number correctly.
Thankyou for your input.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 90 people go through the checkout, each choose a random number between 1 and 90, a machine generates a random number between 1 and 90, what are the odds of someone guessing the number correctly.
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Probability you win is 1/90
Probability you lose is 89/90
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Odds For you winning = (1/90)/(89/90) = 1:89
Odds Against you winning = (89/90)/(1/90) = 89:1
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Cheers,
Stan H.
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