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Question

3. Use the set {0,1,2, 3} to create three digits numbers, determine the number for which:

(1) Even (How many even numbers are there?)

(2) Less than 300

(3) Greater than 300



4. Suppose a password on a computer network must consist of 5 lowercase letters (e.g., mkfps, aazaa). How many passwords are there under various conditions?

a. Unrestricted?

b. All letters different?

c. The first letter must be a?

d. There must be at least one c?

Answer 1

3)

Make a list

111

112

113

121

122

123

and so on. Then answer.