Question

Out of all the trains currently at Middlebury Station, 5 are

headed east, 4 are headed west, and 9 are headed north.
What is the probability that a randomly selected train will be
heading north?

Answer 1

Answer: 1/2

Work Shown:

9 trains headed north

5+4+9 = 18 trains total

P(north) = (# of north)/(# total) = 9/18 = 1/2