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September 30, 2025, 10:05:48 am
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Author Topic: Probability q.  (Read 906 times)  Share 

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HERculina

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Probability q.
« on: October 31, 2010, 07:48:03 pm »
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One card is randomly selected from a standard deck of 52 cards, find the probability that it is either red or a club and has a no. that is at most 5 or at least 8 on it.

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Re: Probability q.
« Reply #1 on: October 31, 2010, 11:55:02 pm »
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At most 5 or at least 8: 2, 3, 4, 5, 8, 9, 10 (i assume you don't include ace?)
Pr (at most 5 or at least 8 AND is red) = 7x2 /52 = 14/52
Pr (at most 5 or at least 8 AND is a club) = 7/52

Add them together you should have 21/52.
Hope that's right.
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HERculina

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Re: Probability q.
« Reply #2 on: November 01, 2010, 03:23:44 pm »
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lol i worked it out already by the time you posted.
o wells, you got the answer right btw ;D
+ karma for you! :D
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