A bag has 5 green marbles and 10 red marbles. Half of the red marbles are made of glass. A marble is selected at random from the bag. What is the probability that it is a red, glass marble? How do I write my answer as a fraction in simplest form.
5 red marbles are made of glass.....there are 15 total marbles
So...the probability of selecting a red one made of glass = 5 / 15 = 1 / 3
