Test 4 Review Problems Progress saved Submit and End VO -. . . . Score: 13/25 15/25 answered Question 16 0/1 pt O 10 0 Details 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 Fred arrive first and Wilma arrive last? 3. Find the probability that Fred will arrive first and Wilma will arrive last. Check