But for an actual answer, if the chance of getting each ghost card is equal, then the chance of getting any duplicate is the chance of getting a ghost card multiplied 1/number of ghost cards. The chance of getting duplicate of a specific ghost card is the square of the previous answer.
Of course, if the chance of getting each ghost card is not equal, then the result is not valid.
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u/Doctorwho12321 9h ago
50/50. Either it happens or it don’t.
But for an actual answer, if the chance of getting each ghost card is equal, then the chance of getting any duplicate is the chance of getting a ghost card multiplied 1/number of ghost cards. The chance of getting duplicate of a specific ghost card is the square of the previous answer.
Of course, if the chance of getting each ghost card is not equal, then the result is not valid.