A box contains shiny pennies and dull pennies. One by one, pennies are drawn at random from...

A box contains shiny pennies and dull pennies. One by one, pennies are drawn at random from the box and not replaced. Find the probability that it will take more than four draws until the third shiny penny appears.

Expert Solution

assuming there are 3 shiny pennies and 4 dull pennies

hence required probability is 31/35

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orchestra answered 1 year ago

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