1. If the probability that John will see a car within the next 20 min is 609/625, What is the probability that he will see a car within the next 5 min?
Assume that the probability of seeing a car at any moment is uniform (the same) for the entire 20 min.
solution:
for this question we need to construct a simple proportion.

20 min probability 609/625

5 min probability x

x = (5 * 609/625)/20 =