Final answer:
The probability of selecting a green ball from a bag containing 13 red, 8 green, and 9 yellow balls is 4/15 when written as a fraction.
Step-by-step explanation:
The question is about calculating the probability of randomly selecting a green ball from a bag containing 13 red balls, 8 green balls, and 9 yellow balls.
To find this probability, we need to divide the number of green balls by the total number of balls in the bag. There are a total of 13 red + 8 green + 9 yellow = 30 balls.
The probability of selecting a green ball is therefore: 8 green balls / 30 total balls.
Expressing this in the simplest fractional form, we get 4/15.