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Question 1 Four digit style codes are used to identify items of clothing. The first two digits are numbers, and the second two digits are
Question 1
Four digit style codes are used to identify items of clothing. The first two digits are numbers, and the second two digits are letters.
How many different style codes are there if a letter or number can be repeated? For example, 90AA is allowed.
Question 2
Nine high school students in the senior class are interested in running for class office. The offices are President, Vice President, Secretary, Treasurer and Historian. How many different slates of officers are possible?
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