Question

Suppose you roll a red number cube and a blue number cube. What is the probability that you will roll a 5 on the red cube and a 1 or 2 on the blue cube?

Answer 1

Sides of cube dice = 6 { with numbers 1,2,3,4,5, and 6}.

On red dice:
P(R5) = 1/6

On blue dice:
P(B1 or B2) = P(B1) + P(B2) = (1/6) + (1/6) = 2/6 = 1/3

For mutually exclusive events;

P(R5 and B1 or B2) = P(R5)*P(B1 or B2) = P(R5)*[P(B1)+P(B2)] = (1/6)*(1/3) = 1/18