A medical center observed that about 60% of its morning appointments were with elderly patients. The table shows the results of a simulation used to represent the scenario. The numbers 0 to 5 represent appointments with elderly patients, and the numbers 6 to 9 represent appointments with other patients. 1 3 8 1 6 9 2 8 6 5 7 7 2 2 4
7 6 6 2 0 7 3 2 0 3 4 3 5 0 4
9 5 8 4 9 7 8 5 7 4 2 5 8 8 1
1 0 0 9 9 9 3 2 1 6 6 2 6 8 8
1 3 7 8 8 9 5 6 0 9 7 2 5 5 4
7 5 5 5 8 0 8 1 7 1 7 4 6 3 9
7 1 0 1 8 2 1 1 6 6 9 1 4 1 5
4 0 9 3 9 4 7 0 2 8 9 0 4 3 2
9 3 7 6 3 6 9 0 8 3 7 2 2 9 8
7 0 5 4 8 3 8 2 0 6 9 4 5 3 9
The estimated probability that it will take at least four patients to find one who is not an elderly patient is ( ) .
The estimated probability that exactly two of three randomly selected morning appointments are with elderly patients is ( ) .