1. (a) How many repeating three-digit numbers can be formed using the numbers {1, 2, 3}?
(b) How many non-repeating three-digit numbers can be formed using the numbers {1, 2, 3}?
My solutions:
a. 3 x 3 x 3=27
b. 3 x 2 x 1 =6
2. (a) Construct a tree diagram for 4 tosses of a fair coin...