Need help with 3a, 3b, 4a, 4b.
Solve using the Multiplication Principle (Fundamental Principle of Counting).
3. A house security system has a 6-digit access code. How many possible codes are there if:
a. digits can be repeated
Solution: (3 pts)
b. digits cannot be repeated
Solution: (3 pts)
4. A club has 15 members
a. How many ways can a three-person committee be selected from this club?
Solution: (2 pts)
b. How many ways can a president, vice president, and treasurer be selected from this club?
Solution: (2 pts)