There are 4 major roads from city A to B and 3 major roads

from B to C. How many different trips can be made from A to

C passing through city B.

6 How many different ID cards can be made if there are 6 digits

on a card and no digit can be used more than once.

7 How many ways can 5 tickets are selected from 40 tickets if

each ticket wins a different prize.

8 How many ways can an adviser choose 5 students from a class

of 20 if they are all assigned the same task? How many ways

can the students be chosen if they are each given a different

task.

9 An investigative agency has 8 cases and 4 agents. How many

different ways the cases be assigned if only one case assigned

to each agent.

10 How many different 3 letter permutations can be formed from

the letters in the word "UNIVERSAL".

11 How many ways can a jury of 5 women and 5 men be selected

from 10 women and 15 men.

12 There are 15 seniors and 20 juniors in a particular social organization. In how many ways can 4 seniors and 3 juniors be

chosen to participate in a charity event.

13 How many ways can a person select 6 televisions commercials

from 12 television commercials.

14 How many ways can a person select 5 DVDs from a display of

12 DVDs.

15 How many ways can a buyer select 7 different posters from 20

posters

4.15. In a binary communication system the signals A, OSt 0 and Y no, surely one has P(IXn) > 1)