There are 6 books on the shelf. 2 books are red, 3 books are green and 1 book is black. If you close your eyes and pick two books at random, calculate the probability of selecting: (a) a red book and green book (in that order) (b) a red book and a green book (in either order). [Give answer as a decimal to one decimal place] HINT: You do not replace a book once it is in your hands.

a.red book and green book in that order

b.red book and green book in any order