There are 8 marbles in a bag.
4 marbles are red.
3 marbles are blue.
1 marble is green.
On marble is selected at random from the bag.
(a) On the probability scale mark with a cross (X) the probability that the marble is red.
1
1
!
(b) On the probability scale mark with a cross (X) the probability that the marble is yellow..
+
(c) Write down the probability that marble is blue.