The makers of the candy M&Ms report that their plain M&Ms are composed of 15% yellow, 10% red, 20% orange, 25% blue, 15% green, and 15% brown. Suppose you randomly select an M&M, what is the probability of the following?
a. It is brown.
b. It is red or green.
c. It is not blue.
d. It is both red and brown.