If a bag contains 5 red balls and 3 green balls, what is the probability of drawing a green ball?

Instruction: Determine the probability of randomly selecting a green ball from the bag.

Context: This question evaluates the candidate's ability to calculate probabilities in scenarios involving a finite sample space.

Updated

Official answer

There are eight balls in total, of which three are green. If every ball is equally likely to be selected, P(green) = 3/(5+3) = 3/8 = 37.5%.

The elementary outcomes are the eight individual balls, not the two colors. The colors are not equally likely simply because there are two of them. Replacement only matters if another draw is made afterward.

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