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-   -   Probability help (https://www.askmehelpdesk.com/showthread.php?t=55727)

  • Jan 18, 2007, 08:34 PM
    sam19antha94
    Probability help
    What are the odds of choosing two clubs out of a deck of 52 cards?
  • Jan 18, 2007, 11:01 PM
    val21
    let me see if I can help you
    52 cards in all
    1/4 are clubs then
    52*1/4= 13
    that 13 clubs in the deckright and you ony need 2
    it would be something like 13 out of 52, but you only need 2
    I don't know if this is right, maybe you need a step more but I don't remember. Write me back and tell me what you think.
  • Jan 18, 2007, 11:21 PM
    Capuchin
    You need to specify how many tries?
    Do you draw 2 cards, and you want the probability of them both being clubs?
    Do you replace after you draw one?

    You need to specify more...
  • Jan 19, 2007, 01:14 PM
    cool_dude
    Capuchin from my experience usually the card is not put back into the deck and then drawn again but I might be wrong. I will assume that you do not put your card back into the deck.

    You draw your first card out of a deck of 52 cards so the chances of you getting a clubs is 1/4 because there are 13 clubs in a deck of cards. Now you have 51 cards and you have 12 clubs left. Therefore the probability of getting the second card to be clubs would be 12/51. Therefore the probability of getting both cards to be clubs is:

    1/4 x 12/51 = 1/17
  • Jan 19, 2007, 01:27 PM
    Capuchin
    I always feel it's important to specify, if the teacher had set that question, then it would be a poor question open too much interpretation.

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