a card is drawn from a deck of 52 playing cards. find the probability of drawing a king or ared card.?

a card is drawn from a deck of 52 playing cards. find the probability of drawing a king or ared card.

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  • bonobo
    Lv 7
    9 years ago
    Favorite Answer

     There are 26 red cards, two of which are KINGS, The remaining two KINGS results

     in a total of 26 + 2 = 28 possible draws.

      P = 28 ⁄ 52 = 7 ⁄ 13 = 0.538

  • minx
    Lv 7
    9 years ago

    probability of a King = 4 / 52 = 1/ 13

    probabiliity of a red card = 26/ 52 = 1/2

    Prob of a king or a red card

    1/ 13 + 1/2 =15 / 26

  • 9 years ago

    King would be a 4 out of 52 probability, or 1 out of 13

    Red would be 26 out of 52, or 1 out of 2

    Source(s): My head and math class
  • Como
    Lv 7
    9 years ago

    P ( A ) = P ( king ) = 4/52 = 1/13

    P ( B ) = P ( red card ) = 1/2

    P ( A U B ) = 1/13 + 1/2 - [ 1/26 ]

    P ( A U B ) = 2/26 + 13/26 - [ 1/26 ]

    P ( A U B ) = 14/26 = 7/13

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  • 9 years ago

    26 red cards plus 4 kings so its 30/52

  • Alison
    Lv 4
    4 years ago

    Since you have already pulled a red card (heart), that leaves the following scenario 26 black cards out of 51 cards remaining. P = 26/51

  • 9 years ago

    28/52 simplified 7/13

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