A bag contains 5 red marbles, 5 white marbles, and 10 blue marbles. You draw 3 marbles out at random, without replacement.

First what is the probability that all the marbles drawn are red? (Your answer will probably be pretty small. To ensure that it is scored correctly include at least four significant figures in your answer)

What is the probability that none of the marbles drawn are red?

The probability of drawing no red marble is?