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hi /bant/ im a tourist
so u are at the train station and u see this man and hes playing head or tail with a coin... then u get interested and he puts coint back in pocket and repeat 200 times randomly estracting a different coin from pocket each tiem. u notice 4 different kinds of coins. then the man comes to u and asks "how many coins do u think i have in pocket and which is probability of tail of each different kind coin? if u answer correctly i pay u 10k$" .... so /bant/ what do u do?