Suppose a uniform random variable gives the arrival time of a bus

from 0 to 20 minutes. Suppose you've waited for 5 minutes and the

bus did not arrive, what is the probability that the bus will arrive in

the next 5 minutes.

(a) 0.05

(b) 0.25

(c) 0.33

(d) 0.75

(e) none of the answers is correct