The following set of random numbers represents 20 simulations of three daily flights from Philadelphia to Seattle, with 0, 1, 2, or 3 representing a late departure and 4, 5, 6, 7, 8, or 9 representing an on-time departure. In how many of the simulations was there an on-time departure for all three flights? 506 619 535 769 096 380 527 555 737 192 092 658 691 320 442 812 968 763 374 282

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