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?

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