24. Suppose there are five traffic lights that you need to pass while driving from your work to
school. The probabilities that you will stop for these red lights are: 0 red light with
probability 0.05, 1 red light with probability 0.45, 2 red lights with probability 0.30, 3 red
lights with probability 0.12, 4 red lights with probability 0.06, 5 red lights with probability
0.02. The probability that you stop for at least two red lights on a given day
(a) 0.20
(b) 0.30
(c) 0.50
(d) 1.00
25. A survey was conducted to learn about the shopping preference of consumers during
holiday season. Out of 2000 respondents 22% said they would prefer to shop online
because of the free shipping offered; 45% said that they would like to shop in malls and
discount outlets while 15% of the shoppers said they would use both. The probability
that a randomly selected shopper would use at least one method of shopping is
(a) 0.67
(b) 0.82
(c) 0.60
(d) 0.52