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#1 2006-12-11 11:25:11

Kiran
Member
Registered: 2006-11-15
Posts: 177

Kittens

A mother cat gives birth to 6 white kittens and 5 black kittens. two of the white kittens and one of the black kittens are fuzzy . a child comes to pick out a kitten that he will take home with him. what is the probability that a child will pick out a kitten that is either fuzzy or white?


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#2 2006-12-11 11:37:15

mathsyperson
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Registered: 2005-06-22
Posts: 4,900

Re: Kittens

This could have two answers, depending on how you interpret the question. Depending on whether or not white fuzzy kittens are counted, the answer could be:

(i) There are 6+5 = 11 kittens in total. 6 of them are white and an additional one is black and fuzzy, making 7 white or fuzzy kittens in total. Therefore, the probability is 7/11.

(ii) 2 of the 6 white kittens are fuzzy, meaning that there are 4 non-fuzzy white kittens. Added to the black fuzzy kitten, this means that there are 5 kittens that are exclusively white or fuzzy. So, the probability is 5/11.


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#3 2006-12-11 11:56:00

luca-deltodesco
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Registered: 2006-05-05
Posts: 1,470

Re: Kittens

yes, thats one thing that can often be confusing in questions like this that use the word or, because you could either mean XOR or OR


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