Math

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Did I do this problem right?
Consider the experiment of drawing two cards without replacement from an ordinary deck of playing cards. What are the odds in favor of drawing a spade or a heart?
Answer: P(Spade)*P(Spade)=(13/52)x(13/51)=169/2652=0.06372. Is this right?
Thanks.

  • Math -

    No, you did the probability of drawing two spades. As I read the question, you want the probabilitiy of one spade or one heart,
    Pr= Pr(one spade and one club/diamond)+pr(heart and one club/diamond).

    Pr=13/52* 26/51 + 13/52*26/51

    check my thinking.

  • Math -

    So, do I multiply 13/52*26/51 for both and then add?
    Ex: 13/52*26/51+13/52*26/51=
    338/2652+338/2652=
    676/2652
    Is this right?
    Thanks.

  • Math -

    Did I do the problem right? Was the answer 676/2652?
    Thanks.

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