Answer:
the probability of the outcome of the color/ Divided by the total of how many colors there are.
Explanation:
in this case there is one yellow, but it may very well be smaller than the other colors so it does not have the probability of 1/4, unless they tell you that all the color sizes are equal.
so now, instead, we shall base it off of the Trial Numbers. Which would be 10/50, which can be reduced to 1/5. :)