a-jar-contains-3-red-marbles-7-green-marbles-and-10-white-marbles-if-a-marble-is-drawn-from-the-jar-at-random-what-is-the-probability-that-this-marble-is-white
A jar contains 3 red marbles, 7 green marbles and 10 white marbles. If a marble is drawn from the jar at random, what is the probability that this marble is white?