4. An unbiased dice is painted so that it has
2 red faces and 4 blue faces.
The dice is rolled twice.
(a) Copy and complete the following tree diagram:
2nd Roll of Dice
PROBABILITIES
Ist Roll of Dice
R
R
B
R
В
(b) What is the probability of obtaining at least one red face?
10 What is the probability of obtaining both faces the same colour?