A spinner has 3 equal sections labelled A, B, C. A bag contains 3 marbles: 1 grey, 1 black, and 1 white. The pointer is spun and a marble is picked at random.
a) Use a tree diagram to list the possible outcomes.
A, Grey
A, Black
A, White
B, Grey
B, Black
B, White
C, Grey
C, Black
C, White...