Question

Suppose you roll a single die. Find the probability of each event. Simplify all answers. Write your answer as a fraction, decimal, and percent

1.) P(5)
2.) P(7)
3.) P(3 or 4)
4.) P(not 5)
5.) P(even)

Answer 1

Single die : 1, 2, 3, 4, 5, 6
P(x) = # of ways to roll x / total number of sides

1) P(5) = 1/6
2) P(7) = 0 ; IMPOSSIBLE TO HAPPEN
3) P(3 or 4) = 2/6 ⇒ 1/3
4) P(not 5) = 5/6
5) P(even) = 3/6 ⇒ 1/2