calculate the probability of guessing 6 numbers on an urn with 90 balls numbered from 1 to 90 (the balls are not reinserted into the urn). After 5 numbers, 4,3,2,1.
After that 6 number on an urn with 91 balls.
All well explained, not only the result.
Please note that I've alredy solve and explained, as you can view in attached Excel. So you have only verify that and calculate odd for 91 numbers.
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