hectorcal1058 hectorcal1058

17-08-2018
Mathematics

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Percy shuffles a standard $52$-card deck and starts turning over cards one at a time, stopping as soon as the first spade is revealed. what is the expected number of cards that percy turns over before stopping (including the spade)? (note: there are $13$ spades in a deck.)

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shoookK shoookK

17-08-2018

3 because it’s 1/4 so you would turn over 3 then the fourth one would be expected to be a spade

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