A bag of marbles contains 16 blue, 8 green, 9 red, 12 yellow and 5 black marbles. What is the probability of drawing a green marble?
Write your answer as a fraction. Simplify the fraction if possible.
There are a total of 16 + 8 + 9 + 12 + 5 = <<16+8+9+12+5=50>>50 marbles in the bag.
The probability of drawing a green marble is 8/50.
This fraction cannot be simplified any further.
So, the probability of drawing a green marble is 8/50. Answer: \boxed{\frac{8}{50}}.