Sarah is playing a game in which she rolls a number cube 20 times. the results are recorded in the chart below. what is the experimental probability of rolling a 1 or a 3? number on cube: 1,2,3,4,5,6 number of times event occurs: 3,6,1,5,3,2 a.0.2 b.0.3 c.0.6 d.0.83