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Answer to Question #25090 in Statistics and Probability for sanjay kumar singh

Question #25090
From a deck of well-shuffled cards, you keep drawing cards. What is the average number of cards you need to draw before you get an ace?
Expert's answer
There are 4 outcomes you want (the 4 aces).
There are 52 outcomes possible (the 52 cards).
There are 48 outcomes you don't want (the 48 cards that aren't aces).
The probability of drawing an ace is 4/52 or 1/13.
There is inverse relationship between probability of drawing an ace& and average number.& =>
=> The average number of cards you need to draw before you get an ace is 13.

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