Homework Help: Math

Posted by B.B. on Thursday, August 13, 2009 at 12:02pm.

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 - bobpursley, Thursday, August 13, 2009 at 4:59pm
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 - B.B., Friday, August 14, 2009 at 9:29am
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 - B.B, Friday, August 14, 2009 at 3:20pm
Did I do the problem right? Was the answer 676/2652?
Thanks.

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