Rhian likes to wear a colored shirts. 15 in the closet. Five of these are blue, 4 are in different shades of red, and the rest are of different colors. what is probability that she will wear:

a) a blue or red shirt?
b) a red or a not blue shirt?
c) a blue or a not blue shirt?
d) a red or a not blue and not red shirt?
e) a blue or a not blue and not red shirt?

pasagot with solution ​