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How many four-digit numbers can you form from the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 (a) if you use each digit only once? (b) if you can repeat each digit?

How many four-digit numbers can you form from the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 (a) if you use each digit only once? (b) if you can repeat each digit?
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4 votes
How many four-digit numbers can you form from the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 (a) if you use each digit only once? (b) if you can repeat each digit?

asked
User Rohith K N
by
7.9k points

1 Answer

4 votes

Answer:

A. 2

Explanation:

answered
User Shalem
by
8.0k points
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