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?

b) Prob (at least 1 red): 2/3

Prob (R,R) = 1/9

Prob (B,B) = 4/9

Step-by-step explanation:

P(at least one red): 1/3 + 1/3 = 2/3

Prob(R,R): 1/3 · 1/3 = 1/9

Prob(B,B): 2/3 · 2/3 = 4/9

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer