A medicine is effective for 80% of patients. The table shows 30 randomly generated numbers from 0 to 999. Use the table to estimate the probability that the medicine is effective on fewer than two of the next three patients. Let the digits 1 through 8 represent the medicine being effective.

463 013 231 898 139
365 492 565 188 465
438 751 961 646 598
045 241 940 901 467
151 774 538 380 509
251 924 401 549 859