Question

question 14 of 25
the following set of random numbers represents 20 simulations of three daily flights from new york to los angeles, 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?
459 931 317 444 432 858 194 192 639 709
742 626 702 258 955 880 505 804 771 132
a. 5
b. 3
c. 6
d. 4

Explanation:

Step1: Identify on-time digits

On-time = 4-9; late = 0-3. Need 3-digit numbers with all digits 4-9.

Step2: Check each simulation

459: all 4-9 → yes
931: 3 is late → no
317: 3,1 late → no
444: all 4-9 → yes
432: 3,2 late → no
858: all 4-9 → yes
194:1 late → no
192:1,2 late → no
639:3 late → no
709:0 late → no
742:2 late → no
626:2 late → no
702:0,2 late → no
258:2 late → no
955: all 4-9 → yes
880:0 late → no
505:0 late → no
804:0 late → no
771:1 late → no
132:1,3,2 late → no

Step3: Count valid simulations

Valid: 459,444,858,955 → total 4.

Answer:

D. 4