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Show your work for solving the questions below . In a collection of 100 coins ,...

Show your work for solving the questions below .
In a collection of 100 coins , 41 are rare . If you select 30 of the coins , what is the probability that :
a ) all of them are rare ?
b ) none of them is rare ?
c ) at least two of them are rare ?
I dont know whether it is binomial distribution or hypergeometric distribution? Can you please tell me which and why?
Math   Statistics-And-Probability   
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