4.

There are 6 roads between cities A and B, and 5 roads between cities B and C. Timothy drives from city A to city C via city B.

(a) How many different ways of travel can he choose?
(b) If one of the roads between cities B and C is blocked, how many different ways of travel
can he choose?

Television viewing reached a new high when the global information and measurement company reported a mean daily viewing time of 8.35 hours per household. use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household. a. what is the probability that a household views television between 4 and 10 hours a day? (to 4 decimals) b. how many hours of television viewing must a household have in order to be in the top 7% of all television viewing household? (to 2 decimals) c. what is the probability that a household views television more than 4 hours a day? (to 4 decimals)