There are 14 marbles total. The chance of a random one will be red 3/14, gray 2/14, black 5/14 or white 4/14.
With the additional information
White marble 4/14 =28.57 % and then a non black 8/13 (remember one white was removed) or 61.538 %
answer multiply the percents and you get 17.58%
With the additional information
White marble 4/14 =28.57 % and then a non black 8/13 (remember one white was removed) or 61.538 %
answer multiply the percents and you get 17.58%
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is it probability?
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You'll most likely get a black or a white one