Answer:
The answer is 1/3
Step-by-step explanation:
Since there are 3 planes that arrive in a random order, there is a 1 in 3 chance that the plane from Chicago will arrive first. Hope this helps!
Taking into account the repeated ones it would be 7! what is 7*6*5*4*3*2*1
12
13
78
97
65
90
70
these are numbers with 2 digits