Question 1138921
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As it is formulated and presented, it is NOT a Math problem in Probability.



It only demonstrates that the person who invented/created this set of words, is unfamiliar with the subject


and is unable to choose and to place appropriate English words and terms to make sense.



I am not going to edit your post for you - it is the visitor's job and responsibility to present a correct,
precise, unambiguous and accurate formulation to the problem.



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OK, I thought on how to formulate and to present this problem in correct wording and mathematical form.

Below is my version.


<pre>
    You went to a shoes store.  In response to your request, the salesman 
    can choose and bring you a random pair of brown or black sandals in sizes 7 8 or 9 with equal probability. 
    what is the probability he will bring you the black sandals in size 8. 
</pre>

Then the answer is obvious:  the probability is  &nbsp;&nbsp;{{{(1/2)*(1/3)}}} = {{{1/6}}}.