Q Lumen OHM X + ohm.lumenlearning.com/assess2/?cid=63067&aid=4630130#/skip/19 Retest 4 Score: 6/108 3/25 answered . Question 19 Fred, Wilma, Betty, Barney, Pebbles, Bam-Bam, and Dino have all been invited to Mr. Slate's birthday party. The arrive randomly and at different times, 1. In how many ways can they arrive? 2. In how many ways can Betty arrive first and Fred arrive last? 3. Find the probability that Betty will arrive first and Fred will arrive last. Calculator Check Answer app.honorlock.com X N O P W