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Scratchers probability puzzle
There's a broken lottery vending machine that sells only $1 scratchers. If you put in $1, it will randomly give you either one, three, or five scratchers with equal probability. You can't put in more than $1 at a time. Someone plays at the machine for a while and stops when they have exactly $10 worth of scratchers. What is the probability they put in only $4?
Aug 3, 2022, 4:07 pm - cottoneyedjoe - Mathematics Forum