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18 October, 11:34

A magician showed a magic trick where he picked one card from a standard deck. Determine what the probablity is that the catd will be a black queen card?

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  1. 18 October, 11:39
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    In a standard deck of cards there are 52 cards. 13 cards per suit and 4 suits. There are 4 queens in a deck. A queen of hearts (red,) a queen of diamonds (red,) a queen of clubs (black,) and a queen of spades (black.) That means that there are two black queens in a deck of 52 cards. Therefore the probability is 2 out of 52 or 2/52. This also simplifies to 1 out of 26 or 1/26.
  2. 18 October, 14:52
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    Standard deck: 54 card

    there is only 1 type of each card

    2 types of each color card

    4 types of each number or sign card

    there are 2 black types in a card deck spades-clubs

    so 2/54 or 1/26
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